active antennas

10 links and 2 categories about active antennas on dxzone.com

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Antennas : Active

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Antennas : Active

Why active antennas aren't perfect - There have been various comments here regarding the effectiveness of active antennas
[Hits: 1688 | Votes: 2 | Rate: 1.00]

Antennas : Receiving

Active receiving antennas - An active antenna is sometimes used for receiving purposes in instances where a normal antenna would be impossible to accommodate in a physical sense.
[Hits: 9060 | Votes: 2 | Rate: 3.50]
Another Approach to Active Antennas - Active antenna with a frequency response that is flat from 5kHz to over 30MHz
[Hits: 1991 | Votes: 1 | Rate: 6.00]

Antennas : Theory

About broadband - What you gain and what you lose. While broadband and electrically small antennas may look attractive on the surface, they are by necessity compromises and usually don’t work as well as tuned antennas.
[Hits: 385 | Votes: 0 | Rate: 0.00]
VSWR Reactive Power - Many antennas and antenna designers neglect the true cause of loss. The major problem using short antennas is the reactance, not the length
[Hits: 70 | Votes: 1 | Rate: 6.00]

Clifton Laboratories - Band Reject Filters, Bandpass Filter, Active Antennas, amplifiers and preamplifiers
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Tecom - Tecom industries product line encompasses a wide range of highly sensitive active and passive antennas for use in airborne and ground applications, providing complete coverage of the 20 MHz to 40 GHz frequency range.
[Hits: 146 | Votes: 0 | Rate: 0.00]

Wellbrook Communications - Broadband active loop antennas for radio amateurs and hobbyists
[Hits: 2827 | Votes: 4 | Rate: 5.25]

An Introduction to 24 GHz - Article provides a guide on how to use 24 GHz band and what to expect, including Active modes, equipment, propagation and antennas for this band in by VE3SMA
[Hits: 143 | Votes: 0 | Rate: 0.00]

QRM and noise reduction Priority listing - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
[Hits: 3417 | Votes: 4 | Rate: 8.00]

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