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Active Antennas, Page 1
Last Updated on: Thursday, April 07, 2016 01:00 PM

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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1-Ground pole Antenna -  This Antenna is most widely used all over the world. For example, when you see a police car it has a transmitter with Ground Pole Antenna The body of car serves as ground). It accepts load from 50 ohm source and has larger power output than Half-Wave Dipole Antenna. (File has several designs, scroll for this one) … [alkhaki AT yahoo.com]

 

2-Half-Wave Dipole Antenna -  It accepts load from 75 ohm source and has much smaller power output than Ground Pole Antenna. Use this antenna only when you don't have GP Antenna. (File has several designs, scroll for this one) … [alkhaki AT yahoo.com]

 

5 Watt FM Transmitter with Antenna 88-108 MHz -  Two stages -- AUDIO AMPLIFIER AND OSCILLATOR and RF POWER AMPLIFIER…

 

6 x 6 Loop Antenna -  This new loop antenna is his best design yet and I am proud to be the first to present his work. It uses one, six foot square, six turn loop, and is aperiodic in nature, covering the frequency range 50KHz, 5000KHz… [Design by Graham Maynard]

A magnetic loop antenna for 160 to 15m -  amateur radio construction projects.… [from Peter Parker's website]

 

A magnetic loop antenna for 40 to 17m local & DX contacts from tight spaces -  amateur radio construction projects.… [from Peter Parker's website]

 

A QRP DX antenna -  amateur radio construction projects.… [from Peter Parker's website]

 

Active 3-30 MHz Hula-Loop Antenna for Shortwave -  If you have a shortwave or high-frequency receiver or scanner that is struggling to capture signals with a short, whip antenna, and you'd like the kind of performance that a 60-foot 'longwire' antenna can provide but lack the space to put one up, consider… [Charles Wenzel (unless otherwise noted)]

 

Active Antenna for AM-FM-SW -  This simple little circuit can be used for AM, FM, and Shortwave (SW). On the shortwave band this active antenna is comparable to a 20 to 30 foot wire antenna.  It is further more designed to be used on receivers that use untuned wire antennas, such as inexpensive units and car radios… [Tony van Roon's circuit]

 

Active Antenna for HF-VHF-UHF -  This simple little circuit can be used for AM, FM, and Shortwave (SW). On the shortwave band this active antenna is comparable to a 20 to 30 foot wire antenna.  It is further more designed to be used on receivers that use untuned wire antennas, such as inexpensive units and car radios… [Tony van Roon's circuit]

 

Active Antenna, easy to build -  When fate or nasty neighbors prevent you from stringing a long-wire receiving antenna, you'll find that this pocket-size antenna will give the same, or even better, reception. This "Active Antenna" is cheap to build" and has a range of 1 to 30Mhz at between 14 and 20dB gain… [Tony van Roon's circuit]

 

Active FM Antenna Amplifier -  This Amplifier will pull in al distanat FM stations clearly.  The circuits is configured as a common-emmitter tuned RF preamplifier wired around VHF/UHF transistor Q1.… [Tony van Roon's circuit]

 

Adding a removable Antenna to your WRTSL54GS -  Over the past few months I've been contemplating a few projects for some WRTSL54GS routers with OpenWrt,however I really need these to have a high gain antenna on the WRTSL54GS. As you may recall, this model has a fixed antenna, with no… [Mike Perez-Circuit Designer]

 

AM Band Antennas -  Scroll down to find this Circuit design.  A good AM Band antenna can be a simple long-wire strung between two trees or across the top of the roof. Even a modest length wire will give your receiver greatly improved reception with less static.… [Charles Wenzel (unless otherwise noted)]

 

AM Loop Antennas (Bruce Carter) -  …

 

AM/FM/SW Active Antenna -  This circuit shows an active antenna that can be used for AM, FM, and shortwave SW. On  shortwave band this active antenna is comparable to a20 to30 foot wire antenna.This circuit uses receivers that use untuned wire antennas, such as inexpensive units and car radios…

 

An automatically tuned HF mobile antenna -  This elegant design covers the complete spectrum from 7 to 30 MHz at less than 1.3:1 SWR, is compact, very weatherproof, robust and has good performance.This article was first published in the QEX / Communication Quarterly magazine. The article comes in five pages, with lots of photos, mechanical drawings, schematic diagram, PCB layout and software listing. Exact duplication is not for the faint of heart, but some of you may find individual parts and ideas useful for your own projects!… [Manfred Mornhinweg]

 

An end-fed antenna -  L-match coupler and resistive bridge for HF one wire, all bands… [Peter Parker VK3YE]

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