wi fi antenna

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wi fi antenna

547 links - and 1 categories

Antennas : 2M
  • Portable Coaxial Dipole Flower Pot Antenna - A homebrew 2m 144.2 MHz vertical 1/2 wave Coaxial Dipole antenna project for your home QTH, SOTA, portable field operations/WICEN exercises or the emergency 2m Go-box. Elsewhere in amateur radio circles this antenna is known as a 2m Flower Pot Antenna
    [ Hits: 103 | Votes: 1 | Rating: 8 ]
Antennas : 40M
  • 40m Wire Antennas Comparison - On the field comparison among C-Pole antenna, an EFHW vertical antenna and an Inverter V dipole antenna. Test is done using two identical WSPRLite beacons that transmit with 200mW on the WSPR frequency and analyzing spotted results.
    [ Hits: 170 | Votes: 1 | Rating: 3 ]
Antennas : Delta loop
  • Delta Loopy Ideas - Setting up a portable wire delta loop antenna with an MFJ 33ft telescopic fiberglass pole
    [ Hits: 102 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • 160-80-40 Metre Trapped V-Dipole - A Trapped dipole inverted V antenna for lower HF Bands. Construction details are for temporary installation. Permanent installations will require additional ruggedising and waterproofing however the basic electronics concepts remain the same. This project includes SWR plots for the three bands and pictures details of the homemade traps.
    [ Hits: 108 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed
  • Multiband portable wire antennas - Vertical end fed antenna used for portable operations. The antenna will work on 80 with acceptable results, it will work fine on 40m, and it will be a good deal better than a normal 1/4 wave GP on 20, 17, 15 meters.
    [ Hits: 186 | Votes: 0 | Rating: 0 ]
Antennas : HexBeam
  • My Cheap Hexbeam - With an eye to the final cost I have built a good 20 meter monoband Hex Beam antenna.
    [ Hits: 176 | Votes: 0 | Rating: 0 ]
Antennas : Magnetic Loop
  • K1FM Mini Magnetic Loop - Original HF magnetic loop antenna designed by the author to work in conjunction with QRP transceivers like the FT-817 in portable operations. In this configuration the loop can operate from 30 to 10 meters. Using a two spires radiator of the same diameter it also covers 40 meters.
    [ Hits: 116 | Votes: 1 | Rating: 8 ]
Antennas : Satellite
  • UHF VHF Crossed Satellite Yagi Antenna - This home made antenna provides around 10.5dBd gain on 70cm, and 6.5dBd gain on 2m, which is more than adequate to work the FM satellites with a handheld dual band radio
    [ Hits: 371 | Votes: 2 | Rating: 9 ]
  • EggBeater Antenna for VHF UHF - This antenna was conceived mainly for high-speed digital transmission via satellite. The antenna is made of two full waves loops , mounted at right angles to each other. Then coupled together, 90 degrees out of phase over a horizontal circular reflector. With this configuration the antenna is omni directional and circularly polarized.
    [ Hits: 226 | Votes: 0 | Rating: 0 ]
Antennas : Shortwave
  • Dual-Band X-Frame Shortwave RX Loop Antenna - A dual band X-frame wire antenna made using 4 turns for response down to 3 MHz or so, and 2 turns (switched) for response up to around 18 MHz. The loop configurations are tuned using common eBay 365 pF tuning caps.
    [ Hits: 148 | Votes: 1 | Rating: 10 ]
Antennas : Stealth
  • The Infamous Attic Dipole - An attic wire antenna with several modifications during the time. Began as a simple coax fed doublet antenna, and upgraded to a multi-band hf fan dipole, till the G5RV all deployed in an attic.
    [ Hits: 100 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Antenna Measurements - Testing of real antennas is fundamental to antenna theory. The most common and desired measurements are the antenna radiation pattern including antenna gain and efficiency, the impedance or VSWR, the bandwidth, and the polarization. The procedures and equipment used in antenna measurements are described in this page.
    [ Hits: 61 | Votes: 1 | Rating: 10 ]
  • Variations on a Dipole - Antenna patterns are all about interference. Presentation on wire antennas for HF bands. Dipoles, horizontal and vertical dipoles, effects of ground on radiation patterns, multi-band wires antennas. Knowing what you should expect from the radiation patterns for waves on your wires will help you choose what will work best for your needs. The principles of interference can lend insight into what to expect from a wire antenna.
    [ Hits: 98 | Votes: 0 | Rating: 0 ]
Antennas : Traps
  • Optimizing Coax-Cable Traps - A document that will guide you on Coaxial-Cable trap optimization process to gain on global antenna performance and on increasing effective bandwidth.
    [ Hits: 163 | Votes: 0 | Rating: 0 ]
Antennas : W3DZZ
  • Build a W3DZZ Antenna - The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.
    [ Hits: 217 | Votes: 1 | Rating: 1 ]
Antennas : Wire
  • The Squid Pole Wire Antenna Re-visited - The author explores enhancing the performance of a 7-meter fiberglass squid pole wire antenna for amateur radio. The wire, resonant at 10MHz, poses impedance challenges on various bands. Experimenting with direct coax feed and UN-UN transformers, the LDG Z11-Pro2 auto-tuner is found effective but may show deceptive SWR readings. The author employs adjustable UN-UN ratios and introduces a custom "porcupine" coil to optimize the antenna's efficiency.
    [ Hits: 87 | Votes: 0 | Rating: 0 ]
Operating Modes : Aircraft scatter
  • Airplane scattering - Operating on Airplane scattering. Scattering of radio signals by airplanes. An introduction to operating ariplane scattering, using aircraft to redirect RF that would otherwise be lost in space. Antenna Pointing, Doppler Shift/Digital Modes, using digital modes to operate airscatter.
    [ Hits: 153 | Votes: 0 | Rating: 0 ]
Operating Modes : Portable Operations
  • Ham Radio And the Art of Bushcraft - This article explores the marriage of amateur radio and bushcraft, advocating the pleasure of setting up a portable station in nature rather than operating from the confines of a vehicle. The Parks on the Air (POTA) programme is highlighted as a catalyst for outdoor radio activities. The author shares his experiences and techniques, from transporting equipment into the wilderness to setting up shelters and antennas. Knot tying skills and the use of frogs are emphasized for efficiency, and a unique method for launching wire antennas is described. The article emphasizes the synergy between amateur radio and bushcraft skills, enhancing the enjoyment of radio operations in wilderness environments.
    [ Hits: 81 | Votes: 1 | Rating: 10 ]
Technical Reference : Arduino
  • WIFI Remote FUCHS ATU for EndFed Antenna - The Fuchs Antenna tuner with a resonant circuit as a coupler. The Fuch Antenna Tuner is providing a high-efficiency compare to a 49:1 transformer using ferrite . The Fuchs tuner is a resonating L/C circuit to step-up the impedance from 50 Ohm to the required 3k. The ATU is able to perform automatic tuning with the addition of a tiny Aduino Nano and a SWR bridge.
    [ Hits: 114 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment
  • Field Strength Meter - The field strength meter (FSM) is a very useful addition to any HAM toolbox. If you are messing around with antennas, or building PA's, or trying to repair some TX gear, the FSM will come to your rescue when there is doubt about the output level.
    [ Hits: 80 | Votes: 0 | Rating: 0 ]

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