Remote antenna indicator. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Remote antenna indicator. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Antennas. Measurements, setup and matching

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Those radio amateurs who live in high-rise buildings know how much work it takes to set up an antenna. So I, having run back and forth more than a dozen times, decided to somewhat simplify this procedure. I ran two insulated wires from the apartment to the roof, which I used when setting up the antennas. If the antenna is tuned to receive, then the wires go up to the transceiver's low-frequency output, and the second ends (on the roof) go to the tester or phones.

If the antenna is tuned in transmit mode, then these wires are used to control the transceiver - switching it from receive mode to transmitter setup mode. If necessary, these wires can be used as a two-way telephone line (when tuning the antenna with two radio amateurs). Well, when the antennas are configured, this line is used to connect to a remote antenna indicator. This indicator is a bridge consisting of four high-frequency diodes, in the arms of which two pieces of wire are included. The voltage rectified by the bridge (from the antenna) is fed through the line to the microammeter (Fig. 1).

Remote antenna indicator
Ris.1

The length of the segments of the dipole is desirable to choose a multiple of the wavelength of the controlled antenna. This indicator allows you not only to tune the antenna, but also to control the operation of the transceiver, and at a sufficient distance from the directional rotating antenna, to record the radiation pattern. The wires brought to the roof should be twisted together to prevent interference.

Literature

Radio amateur 5/95, p.43

Publication: N. Bolshakov, rf.atnn.ru

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