A subreddit for the low-cost software defined radio (SDR) community. Out of Stock. so this type preamplifier is suitable for a variety of devices including the SDR (software defined radio). Cb Radio Beam Antenna Homemade. Antenna construction is going to depend on your materials at hand and the center frequency you want to "focus" on. W2 Import Code. Sirio Antenna SD 2000 U 100 Mhz-2 Ghz Discone Wide Band Antenna. Source: www.instructables.com. Our Price: $119.95. Discone: This guide will teach you how to make a durable discone antenna aimed at the rtlsdr crowd. Tram 1411 Broad Band Discone/Scanner Base Antenna. An interesting application note about WLAN discones (2.4 to 5 GHz) by Clemens Verstappen (DL3ETW) appeared in FUNKAMATEUR, 2/2013, p.156. Outperforms several antennae in the $2000+ USD price-range. Cheap COAX may have a 98% shield in it�s specs but it won't be
Explore. I was recently poking around and I found a huge number of antennas over at Instructables when searching for DIY HDTV Antenna. Omnidirectional, vertically polarized and with gain similar to a dipole, it is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1.The radiation pattern in the vertical plane is . Uniden Bearcat BC780XLT Police Scanner Mobile Radio Accessories Bracket Hardware. I'm in 100% agreement. I saw some
Press J to jump to the feed. The result is you just won't hear as many signals
Let's get started. Buy Wideband Scanner and get the best deals at the lowest prices on eBay! pdf, MAC via. The only drawback is that I have to adjust the gain as I move around a fair amount. Cb Radio Beam Antenna Homemade. Its my understanding that a balun would always smooth out the impedance curve substantially. Your posted earlier about the impedence and deleted it, but you made a good point there. Model #: MvWdC-B07HDS7PG4. In addition, specific models mentioned in the Antennas forum Like diamond antennas, comet, Yaesu, Icom, watson cushcraft, MFJ and more are here for future reference. This is why TV antennas make lousy scanner antennas. The Tunable VHF Airband Ground Plane base antenna is now available! I agree, it really is awesome. HF-2-30 is a two folded dipole antenna whereas. 01 - Tee Antenna. Help Build A Discone Antenna 30-512 MHz The plans, design, theory & application for your discone antenna project is all in here: Amateur Radio Antenna Projects For real world tips, hints & opinions for DIY success try these three awesome sites: www.qsl.net eHam.net Home - Amateur Radio (Ham Radio) Community Site Welcome to the Receiving / scanner Antenna page. The wideband reception of this antenna covers 25-1300 MHz and transmit bands can work for 26, 27, 46, 49, 72, 144, 220, 440, 900, and 1290 MHz Maximum power a Tram 1411 Indoor Scanner Antenna can produce is around 300 Watts CB or 200 Watts VHF and UHF. This site hosted by
ground your system as appropriate. There are 3 primary types of scanner antennas for your home: Discone antennas are best for wideband monitoring 30-1300MHz and are the most common antenna type. $ 29.49 (2 Offers) -. If you are search for Diy Discone Antenna, simply check out our info below : Recent Posts. signal will be lost before it gets to your radio, and you will be
$37.00. Resources listed under Receiving antennas category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. If the
RX: 25-1300MHz TX: 6M/2M/440/900/1200MHz Length: 4′ 8″ Max Power: 100 watts Weight: 3lbs 3oz (without coax) Connector: SO-239 You may want to consider building two antennas, one for low band and VHF, and the other for UHF and above, and combine their outputs with a duplexer to have a single feedline to the scanner. Whether you're operating on 2 meters or you work in the 1.2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. 99. The J-Pole antenna has a low noise floor and wide bandwidth, so it will do an excellent job picking up your VHF and UHF . Welcome to the scanner antenna page. I don't know much about lightning protection, since here is Silicon valley
Radio antenna sold here, We update our stocks to keep in touch with modern improvements in scanner antenna design. When used with external power (not USB) both are rock solid stable, one is extremely sensitive. The lines divide the square into four . August 26, 2017 - by Arfan - Leave a Comment. Margaret Byrd September 4, 2021. Okay, I will try to do a how-to with photos soon. wave and the better RG8 cable will be plenty good enough. A truly simple, easy to hide ultra-wideband antenna quite suitable for RTLSDR use. (36) 36 product ratings - Super Wideband Discone Scanner Base Antenna 25-1300 MHz Receive Tram 1411 . If you're an amateur radio hobbyist who monitors the 800 MHz police, fire and public safety bands, a homemade wide-band scanner antenna may improve your reception. 800 MHz 2.5db Gain Base BNC Scanner Antenna (back of set) A 2.5db gain antenna with BNC male connector which will significantly improve reception on 700/800 MHz, perfect for trunking systems. £49.99. is the quality of the cable itself, this is something that you can't see or
BASE STATION ANTENNA SIRIO GPE-27 5/8 WIDE BAND 26-28 MHz 250-750 WATTS 6500mm. Next strip off the insulation and attach one end of the loop to the center conductor of the coax, and the other end of the loop … Most stock antennas are going to be wide band antennas, they cover a large portion of the RF spectrum. their loss at different frequencies for comparison. The VHF-Hi band covers 175 to 230 MHz, while UHF covers 470 to 860 MHz. A lot of the pictures look like they are from dorm rooms, which is how I got started. On VHF, don't bother. Here, you'll find links for high gain antennas covering hf-vhf-uhf. $69.95. If you're a newcomer or old hat, or anywhere in between, when installing antennas, Safety First. Don't become a statistic! For lack of a common nomenclature and a relatively close optical proximity to a log-per design, this type is going to be ignorantly called log-per-spiral.The monopole is "glued" onto a self-adhesive, semirigid, matte-white material and then rolled to a cylinder with . Wideband Scanner Antennas Loops To Build Spy Antennas CM Howes ATU Kit Reviewed RF Systems MLB MkI Tested Regular Features Include Airband, Scanning, Junior Listeners, SSB Utility Listening, Propagation, Amateur Band Long, Medium & Short Waves, Satellite 1V Reports, Weather Satellites and More! A 10dB pre-amp and 10dB cable loss will produce the same level at the receiver input as would no pre-amp and a short cable. Oct 31, 2015 - Simple, cheap DIY radio scanner antenna (receive only, for police scanners) Oct 31, 2015 - Simple, cheap DIY radio scanner antenna (receive only, for police scanners) Pinterest. The whole antenna just needs to be re-oriented to vertical polarization. The discone antenna or discone aerial is often used where an omnidirectional wide band or bandwidth RF antenna design is needed. That is why you should always buy name brand
The Telewave ANT280S Wideband Discone Antenna 118 MHz-3 GHz, is a rugged, lightweight, wideband antenna for all frequencies between 118 MHz and 3 GHz. Here, you'll find links for antennas covering 30 Mhz and up. This ANTGAIN dual-band antenna covers a super wide frequency range of 140-162/435-467 MHz (less than 2:1 SWR) with 3 dB gain on VHF and 5.2 dB gain on UHF. Diy Discone Scanner Antenna. Great Savings & Free Delivery / Collection on many items. Dipole antennas are for single or narrow band use. wrong, without using an expensive network analyzer setup. Heavy Duty, Ultra Rugged 900 Mhz Yagi Antenna, 7 Element, 12 dbi, 880-960 Mhz. General Scanning Information. Diy Discone Scanner Antenna. Access your pay summary online. The high end SDR manufacturer RF Space produces their own Vivaldi antennas made from PCB boards which they sell online. It is directional so it may not be the best choice for you. I use Heliax on my system for
© 2005 Jim Fordyce, These pages created by Jim Fordyce. Scanner Antenna: This is a simple but sensitive Home Made J-Pole Antenna that works great when You are limited as to a place to mount an external antenna !What You Will need: 1( 48 1/4 " twin lead wire2( Measuring tape3( Exacto knife or similar cutting tool4( electr… Thats a really good question which I should figure out the answer to. gation sometimes favoring one antenna over the other. shield. Includes 65 feet of RG-58A/U coax with PL-259 connectors installed . The discone type is better if you also need to monitor frequencies out of the normal public safety bands, Like military, etc. Touch device users, explore by touch or . $14.99. This… The response was roughly equivalent to the popular Grove OMNI scanner antenna. Get the ultimate wideband performance with a discone antenna! Yagi antennas are for single or narrow band use. If you want to build a wideband directional antenna, a log-periodic . AOR: SA7000 Wideband Base Antenna 30 kHz - 2000 MHz: NTi: GA3005 Wideband Active Antenna 9 kHz - 3000 MHz: MA305FT Wideband Active Antenna 9 kHz - 300 MHz: MD300DX Wideband Active Antenna 9 kHz - 300 MHz: ML060 Wideband Active Antenna 9 kHz - 60 MHz DISCONTINUED: ML200 Wideband Active Antenna 9 kHz - 200 MHz DISCONTINUED: Please Also See: Shortwave Antennas: Scanner Antennas . I will show you how to build a complete discone antenna with just materials from home depot and radioshack in one afternoon for about 100 to 150 dollars. Today. For this UHF antenna tv amplifier to work correctly you need to cut the components pins as short as possible. Cut out a large square of cardboard, say, make it 1 meter square. susceptible to multipath distortion in strong signal environments. It was designed with a strong and sturdy magnet that will be sure to stay attached to your vehicle. It's a good idea to have your antenna at least one half ( 1/2 ) wavelength of the antenna. Eventually, a very satisfactory combination Frequency 25-1300 MHz. to the California Highway Patrol, in the 39-45MHz band, then a VHF 1/4 wave
Broadband antennas, often interchangeable referred to as wideband or wide-band antennas are antennas that provide solid antenna performance over a large range of frequencies. 4 - Fosa 30MHz-1200MHz Wideband Scanner Mobile Radio Antenna For those who aren't really tech-savvy, a beginner-friendly antenna is ideal. Welcome to the Scanner Antennas page. Click & Collect (£49.99/Unit) £5.99 postage. You want a magnetic loop antenna. Use one sheet for the middle so the seams are spaced at equal distances on both sides. insulator in the center). Out of Stock. The J-Pole as a scanner antenna focuses it's frequency range on a smaller part of the spectrum. cable from a reputable manufacturer. The ANTGAIN has an overall length of 39 inches with a handy antenna fold over feature and is rated at 140 watts maximum power. Dipole antennas are for single or narrow band use. The lines divide the square into four equal size triangles, using some conductive material (a sheet of very large aluminum foil would be best, but if thats not available, use regular aluminum foil taped on both sides with with aluminum tape and stapled at multiple spots to cover the top and bottom triangles, but not the side triangles with foil. easily routed, and not very expensive. Find many great new & used options and get the best deals for MS-119 Super Scanner CB Beam Base Antenna Instruction Manual with Checkout Sheet at the best online prices at eBay! This discone style wideband base antenna from Sirio will be suitable for all modern scanners covering the frequency range from 300-3000MHz. I have been using a disk-cone for over 20 yrs and it works great for me. As a ham radio guy it's great to see that the RTLSDR has brought life into people making their own antennas. The bell shape and disc function as a . Do you know if anybody uses a USRP as their ham rig? The D130J Super Discone Antenna is an ultra-wideband antenna covering amateur radio, commercial 2-way, cellular, air traffic control and various utility frequency bands. thats an arbitrary number sorry if that isn't clear, it could be tiny for use way up in the multi-GHz range or larger to work down much lower. 4.5 out of 5 stars. I've found that filters really help, especially an additional AM trap filter assists the SDRs a lot in terms of performance. Typical broadband frequencies are 200-6000 MHz (0.2-6.0 GHz), 30-512 MHz, 500-6,000 MHz (0.5-6.0 GHz), and 100-520 MHz. "I wonder how this would compare to a discone or the planar disc antenna linked on the side bar.". Depending on which you choose, our line of versatile discone antennas gives you the ability to cover Amateur Radio, public safety, commercial 2-way, cellular, air traffic . Cost to make: about $25. This is very basic. The antenna element itself is a simple quadrilateral monopole, in the shape of a wedge, with a narrow start and a wider end. A 1:1 balun broadband enough to work over the entire RTLSDR range can be gotten from mini-circuits but its SMT and will require a PCB version of the antenna. GRAY-HOVERMAN, THE WIDEBAND TV ANTENNA Air TV channels transmit on frequencies ranging from 170 MHz to 860 MHz. 361. to railroads or police/fire in the 150MHz band. AEcreative Wide-Band Scanner Antenna for Uniden SDS100 BCD436HP BCD396XT BC346XT BC75XLT BC125AT BR330T Whistler TRX-1 WS1040 WS1080 RadioShack Pro Icom IC-R30 IC-RX7 AOR Alinco DJ-X11 DJ-X7T BNC SMA. We offer a huge selection of Yagi antennas, including cross-polarized and circularly polarized, from top brands like M2 Antennas, Cushcraft, MFJ, and Diamond Antenna. I'd agree with Jon on the two antenna approach. 4.9 out of 5 stars. The problem
The 1/4 wave vertical element will tune to any frequency between 108 and 137 MHz. When autocomplete results are available use up and down arrows to review and enter to select. Manufacturer Tram. Diy. Frequency is the other MAJOR contributing factor in determining your
It is usually mounted vertically, with the disc at the top and the cone beneath. These are from the Belden Wire and Cable catalog, except for the Heliax. Receiving only antennas category is a curation of 85 web resources on , The K7TJR Array 160m antenna, 160 Meters 4 Square Receive Antenna, The W2PM Mini Diamond Receiving Flag. coax antenna cable, filter them down based on a range of parameters to narrow down your Find the best and most suitable deals for you at the most competitive prices available online. Top quality construction will give years of use, and this antenna is fitted with a low loss "N" type socket for the coaxial feeder cable (not supplied). D1300AM Super Discone Antenna for Wide band. Anyway don't forget to
Step 3 - Home Scanner Antenna Type. with the density and effectiveness of the shield and the dielectric (the
If you only listen
we rarely ever get any lightning, maybe once every 5 years. The discone design incorporates a metal ground plane disc atop a cone. RY900-12-7-SNF-19 © 2005 Jim Fordyce. Step 3 - Home Scanner Antenna Type. Source: www.instructables.com. Probably a discone, or a multiband fan dipole similar to the ST-2. I am trying to build a wide band receiver antenna but am coming up short on ideas and designs so I figured that I would open it up to the forum here and see what all you guys have done in the past. Normally a discone or a scantenna is suggested as the wideband antenna of choice, however there are alternative designs such as the Dressler ARA-2000 which is a type of log spiral antenna that can receive from 50 - 2000 MHz. BTW, a log-periodic is not a dipole. Yagi antennas are for single or narrow band use. (If you did thi. (there's one specifically for VHF/UHF) and check your local library. Since they are made with dipole elements cut for each band, They will outperform a wideband Discone type. In that case, you will use all four pieces of foil from the square. Shop now. Seriously, that's ultra wide. Type: discone. users also vary, from amateur radio communications, SATCOM (satellite), wideband receiver (scanner), TV VHF / UHF, HF radio, microwave. listen to the 800MHz trunked band you can significantly improve your
Super Wideband Discone Scanner Base Antenna 25 1300 Mhz Receive Tram 1411 It can also be used to find open WiFi access points on the go. Sometimes there will be
Using a straightedge, draw an "X" using two lines, with the lines going to the corners of the cardboard square and crossing in the middle.
Polarization would be vertical assuming the triangles are on top and bottom. This antenna covers a huge range of frequencies from 25 Mhz all the way to 3 Ghz! We test the antenna indoor and outdoors.". Antenna connector: Although not a major consideration when buying a discone, the connector used at the base of the antenna is typically a "UHF" SO239 connector for those used for scanner applications. Wideband Desktop Discone Antenna - 25 MHZ - 2000 MHz Coverage. Scanners, Receivers and Related Equipment Forums. If the shield is not very good, more of the
This antenna from Fosa is easy to install and use, coupled with a strong signal and reception at 30MHz to 1200MHz. Each antenna is con struct ed from Mil. Attach your coax to the spot in the middle with the center conductor (I used two triangular pieces of copper as solder anchors, and taped and stapled them to the rest. Most specialized antennas work best for the portion of the RF spectrum they're cut for. Despite being so close, the stock scanner antenna . Build An Indoor FM Antenna With These Plans On the last end, where we will attach the coax to the FM antenna, put both ends of the wire into the slot leaving about an inch extending past. antenna [4].A spiral antenna is a radio frequency antenna which holds a property of being frequency independent and thus are wideband antennas and finds its application mainly in the . About Diy Discone Antenna. Here is a simple VHF/UHF scanner radio antenna you can build using very inexpensive coaxial cable and a few parts plus some bits of wire! If you want to get super involved, make two and put them in parallel and use a notch in the middle to allow them both to be connected perfectly together. Return Policy: View Return Policy. TY-900 Kathrein Scala Equivalent. This will apply to all signals as the scanner antenna is wideband. Wideband DTV UHF Antenna TV Amplifier. losses. at the higher frequencies. Typically when searching for a suitable antenna one is interested in standard antenna parameters such as gain, frequency, polarization, etc. Diamond D130J / D130NJ . The antenna can be positioned at a right-angle for base scanners or vertically for portable scanners. It can also be used to find open WiFi access points on the go. Ultra wide-band discone (omni-directional). Scanners are usually very sensitive, sometimes overly so, and a bit of "accidental . Spec. KB9VBR J-Pole antennas used for scanning and Public Safety Communications. 3 offers from $102.95. If you want to use a wide band UHF TV antenna, try a 4-bay bow tie, it has about 6dB of gain, a 15dB front-to-back ratio and resonates across a wide frequency range. In this Instructable, I make a battery-powered portable long-range 2.5 band WiFi scanning device used to determine which channel is best for my home network. But if you
Using a straightedge, draw an "X" using two lines, with the lines going to the corners of the cardboard square and crossing in the middle. The Antenna is an ultra-wideband antenna covering amateur radio, commercial 2-way, public safety, air traffic control and various utility frequency bands. Super Scanner 1, Base Scanner Antenna, 20'Coax, Four Separate Antennas Inside! ground plane antenna and any kind of COAX will do, such as RG58, which is
(If you want to use a 4:1 balun, all I can say is electrically then it would need to be more like a folded dipole, but involuted upon itself. August 26, 2017 - by Arfan - Leave a Comment. You could shift the orientation sideways and then use it with a 1:1 balun (CATV baluns are 4:1 so not one of them) and it would make an excellent TV antenna. The gap between is used for cable TV. This antenna, fed with high quality coaxial cable, will provide excellent performance for an air band monitoring station. Dipole antennas often are the easiest to build, and then turned into inverted V antennas by raising the center of the antennas up into the inverted V style. Knowing how to build a multiband scanner antenna for UHF, VHF and higher bands will . These things would be a lot more concrete and valuable if you just pointed and clicked a phone or camera at them - at least, if they ever existed outside your mind. Christ0ph, I've been reading your posts since the beginning of r/rtlsdr, and you post a LOT of information about various designs that would REALLY benefit from pictures, but rarely, if ever, a picture. There are some slight variations on the bowtie antenna, basically, for vertical polarization a balun isn't necessary (although it can be useful to put a ferrite ring on the feedline, especially if you plan on transmitting.) Press question mark to learn the rest of the keyboard shortcuts. You Save: $10.00. Antenna loading coil everything you how to turn your cb car radio into a hb9cv 2 element yagi for the 11 meter circular polarized cb beam antenna plans the gutter beam. 1M square? CB & Scanner Antennas. Rust-free stainless steel is employed in major component parts making the antenna rust resistant and durable. This is basically a vertical realization of the bowtie antenna. If you want more in-depth information, try the ARRL Antenna Handbooks
The D130J/D130NJ Super Discone Antenna is the first ultra-wideband antenna in the market which can cover amateur radio, air traffic control and other various utility frequency bands and, in addition, even some amateur radio frequency bands within the covering frequency range can be transmitted with this antenna alone. It would probably be useful to provide at least some of this information, even if it is anecdotal in nature. All sorts of stuff! see whats great for your garden en start to build your own!!!!! The file should. You could fold them in an L on top and bottom and only connect them at the center, it doesn't matter. New comments cannot be posted and votes cannot be cast. Antenna loading coil everything you how to turn your cb car radio into a hb9cv 2 element yagi for the 11 meter circular polarized cb beam antenna plans the gutter beam. That would probably take some high end EM program to design well if its possible at all.). The higher the frequency, the higher the loss. This HD TV UHF wideband amplifier (Ultra High Frequency amplifier) has a total gain of 10 to 15 dB in the 400 - 850 MHz domain frequency so it can be used where the tv signal is weak. . Scanner Antenna from bent arrows… this 1/4 wave antenna does a decent job, almost pulled in NOAA sat's imagery… mainly designed for 2 meters, aircraft, fire and police scanning… took about 30 minutes to build… all arrows cut to 19.5 inches. Awesome! There is a reason the cable is cheap. DISCONE ANTENNA FOR WIDEBAND RECEPTION download: DA1500 brochure (370kB) DA6000 COMMERCIAL GRADE DISCONE download: DA6000 brochure (1MB) SA7000 TWIN ELEMENT download: SA7000 brochure(150kB) MA500 MOBILE WHIP download: M500 brochure(185kB) LA400 10kHz-500MHz, Receive only magnetic loop antenna . Biconical antenna. This ProComm JBC290M is a great magnet mount wide band (25-1200 MHz) scanner antenna. This versatile antenna provides a highly flexible solution to inter-operability requirements in multiple bands. properly, or the materials used are sub-standard, the result will be BAD
discern from the specs, RG-8 is RG-8 right? Apr 5, 2017. Vivaldi antenna 9 - 25 Ghz ultra wideband antenna . Rust-free stainless steel is employed in major component parts making the antenna rust resistant and durable. It works with any scanner on any vehicle and can be installed and removed with ease. (put it on the back and use a tapered microstrip going down to the feedpoint). The log-periodic would give you gain while the disk-cone is unity gain at best. Some cable loss without using a pre-amp can actually be beneficial. The impedance probably varies quite a bit but it is a lowish one and its a close enough approximation to 50 or 75 ohms to work well with either coax. Tuned to the 150-160 MHz public safety band, it will excel on these frequencies, but will also easily receive signals along the entire 136-174 MHz VHF High band. While originally dedicated to the [RTL2832U USB rtl-sdr](http://sdr.osmocom.org/trac/wiki/rtl-sdr) project, relevant content related to general SDR, RF, and similar projects are also welcomed. Working with antennas has long been an exciting hobby both for the novice and the expert. Buy Wideband Scanner and get the best deals at the lowest prices on eBay! Dimensions of a discone antenna home made coat hanger portable hackaday io this mostly printed eham net from. dielectric is made wrong, the impedance of the COAX will vary. Whether you are building one from a kit or from items laying around the house, you're sure to have a great time and learn in the process. In this Instructable, I make a battery-powered portable long-range 2.5 band WiFi scanning device used to determine which channel is best for my home network. In addition to high gain, log periodic antennas offer superior front to back ratio and side lobe rejection. The larger the antenna, the lower its receiving frequency, and ones that go down to about 200 MHz are almost the size of a full adult person. Build a Police Scanner Antenna for the price of parts! . Gain should be equivalent to gain from a dipole tuned to the frequency which is to say slightly better than a discone generally. . one quarter (1/4) wave is the minimum height above ground for effective performance. 4.3 out of 5 stars 249. WRONG, because it is a
Wide-Band Scanner Antenna for Uniden SDS100 BCD436HP BCD396XT BC346XT BC75XLT BC125AT BR330T Whistler TRX-1 WS1040 WS1080 RadioShack Pro Icom IC-R30 IC-RX7 AOR Alinco DJ-X11 DJ-X7T BNC SMA. maximum performance. The same for
SD .- i SONY c<c- 9y l `y "". DIY Scanner Antenna. consistent across the entire length of the cable. reception, by just using better COAX. s ^ Os O N O O fV d N- will vary tremendously. In addition, specific models mentioned in the Antennas forum like diamond antennas, comet, yaesu, icom, Watson cushcraft, mfj, and more are here for future reference. Why I like the Diamond D3000N and why it's the best scanner antenna >> Diamond Original D3000N Super Discone Antenna (view on amzn) Quality. $24.99 $ 24. Design and simulation was done using a combination of MATLAB, CST Microwave St. Description. What we need is some people to think of them as the first piece of a ham station. The fact is, I've read much less on the planar disk antenna than this antenna. 6061-T6 solid aluminum, weld ed at . An antenna that specializes on either of those bands, such as the 155-160 MHz Land Mobile and Scanner J-Pole antenna or the 462 MHz GMRS and Land Mobile antennas are excellent choices for reception on either of those bands. The lower limit on the range is determined by size and it should be roughly equivalent or slightly below the frequency which a dipole made of two conductors of the same length as the distance between the feed and the farthest part of the foil would resonate at. Long Range WiFi Scanner Using ESP8266. Transmit Bands are 144, 220, 440, 900 & 1200 MHz. Cut out a large square of cardboard, say, make it 1 meter square. areas several feet long with large gaps with only a few strands in the