hi gain

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hi gain

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Antennas : 2M
  • 2 Meter 10 Element Quagi Antenna - This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.
    [ Hits: 15653 | Votes: 32 | Rating: 7.06 ]
  • 2m VHF antennas with high gain - 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth. These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.
    [ Hits: 8261 | Votes: 12 | Rating: 7.75 ]
  • ZR6KMD 2M Beam Antenna - This design was adapted from an article in the ARRL Handbook and built with simplicity and duplicity in mind. This antenna is a vast improvement over a standard dipole with a forward gain of around 8db with a front to back ratio of 10db.
    [ Hits: 2222 | Votes: 1 | Rating: 2 ]
  • Slim Jim 2m Vertical - This VHF 145 MHz antenna is easy to build and with no radials. It shows equal gain of 5/8 lambda. It is light weight, you can hang it somewhere (on a tree may be) and work.
    [ Hits: 3390 | Votes: 3 | Rating: 6 ]
  • 3 elements VHF yagi antenna - 3 elements VHF Yagi homebrew antenna designed with YAGIMAX 3. Maximum forward GAIN is about 8,17 DBi. This antenna offering an effective radiation power 4 times greater of the transceiver output by SV1BSX
    [ Hits: 14036 | Votes: 59 | Rating: 4.51 ]
Antennas : 70cm
  • Quadrifilar Helix antenna for 436 MHz - This is an antenna that author just built. Was intend for receiving the AO-27 downlink (at 436.800 +/- doppler). It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB.
    [ Hits: 3888 | Votes: 4 | Rating: 4.5 ]
Antennas : 80M
  • 80 meter frame antenna - This projects was developed as a result of experiments to become QRV on 80 meters, again, using the little balcony by SM0VPO
    [ Hits: 6589 | Votes: 8 | Rating: 6.5 ]
Antennas : Collinear
  • Omni-Gain Vertical Collinear Antenna - This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. It's a good choice for repeater installations and can be top, or side mounted to the tower by WA6SVT
    [ Hits: 10742 | Votes: 7 | Rating: 4.86 ]
Antennas : Dipole
  • Inverted Vee monoband antenna - This project will enable you to build a monoband long wire inverted vee with 3/4 wave length sides that will have a bit of gain
    [ Hits: 2263 | Votes: 1 | Rating: 10 ]
Antennas : Homebrewing Techniques
  • Antenna Gain Comparison System - This device goal is to optimize homebrew antenna for the V/UHF band. This tool, is based itself on the simultaneously comparison between two antenna, directly in dB. by IK0BDO
    [ Hits: 2212 | Votes: 12 | Rating: 5.58 ]
Antennas : Portable
  • 70cm Quadruple Quad - A suitable high gain 70cms antenna for SOTA operation by Richard Price GW0VMW
    [ Hits: 11671 | Votes: 16 | Rating: 6.25 ]
Antennas : Quad
  • BiQuad Antenna for 144/440 - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain by KE4UYP
    [ Hits: 7595 | Votes: 14 | Rating: 4.86 ]
Antennas : Theory
  • Antenna Measurements - The electrical characteristics of an antenna that are of interest to obtain by direct measurement are the frequency at which the antenna is tuned, the gain and radiation pattern
    [ Hits: 946 | Votes: 3 | Rating: 4 ]
Antennas : Theory : Antenna Gain
  • Antenna Gain on Trial - Most people think it's a good thing to have and the more the better. However, this is not always true - and the amount of gain is often not what it appears to be. Assuming higher gain is what you need, how do you determine what will give the best performance?
    [ Hits: 972 | Votes: 2 | Rating: 5.5 ]
  • Corner reflector antenna - Do you need a high gain antenna? Have you suffered on picking up interference from unwanted direction? You need a directional antenna but a 12 element Yagi will be too attractive!
    [ Hits: 1707 | Votes: 4 | Rating: 3.75 ]
  • Antenna Gain - How much gain ? This article help you on understanding how read antenna gain values in order to evaluate antenna performance
    [ Hits: 5319 | Votes: 9 | Rating: 5 ]
  • Antenna Gain to ERP - A radio's transmitting power can be concentrated along the horizon by use of a GAIN antenna. Although you may still be transmitting with four watts of power, your effective radiated powerwill be greatly increased. This table shows the effects of antenna gain on a transmitter with 4 watts of transmit power.
    [ Hits: 1386 | Votes: 4 | Rating: 4.5 ]
Antennas : VHF UHF
  • Parabolic Discone antenna - This is the highest gain omni design the world may ever know having wide bandwidth
    [ Hits: 2704 | Votes: 3 | Rating: 9.33 ]
  • DK7ZB 144 mhz Yagis - High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
    [ Hits: 1908 | Votes: 7 | Rating: 6.86 ]
Antennas : WiFi
  • A 2.4 Ghz High gain antenna  pop - Here is how to build a high gain antenna for 2.4 gHz wireless networks. Several hams are experimenting with these devices in an effort to build a network. It is sometimes referred to as Hinternet or HSMM.
    [ Hits: 61430 | Votes: 90 | Rating: 5.55 ]

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