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Active Antennas
Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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A magnetic loop antenna for 80 & 40m an antenna for anywhere, even indoors! -
amateur radio construction projects…. [from Peter Parker's website] |
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A QRP DX antenna pier + squid pole + wire = QRP DX - amateur radio
construction projects…. [from Peter Parker's website] |
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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....(electronic
design added 7/08) |
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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] |
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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] |
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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] |
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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] |
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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….(added 04/04/04) |
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AM Loop Antennas (Bruce Carter) - (electronic circuit added 1/03)
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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....(added 4/02)
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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] |
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