Adder for two VHF antennas. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Antennas. Technology
Comments on the article
The proposed adder (Fig. 1) can be used when working with one cable for two antennas 144 and 430 MHz.
Ris.1
The adder is assembled on a printed circuit board measuring 55,5 x 74 mm from double-sided foil-coated fiberglass 1 mm thick (Fig. 2).
Ris.2
Inductances L1 - L5 are made by printed wiring, capacitors C1 - C5 are leadless. The attenuation in the transparency band of the diplexer channels is no more than 0,6 dB (frequency response is shown in Fig. 3).
Ris.3
When using the device with transmitters with an output power of 50 W, the capacitors must have Upa6>250 V.
Literature
- "CQ DL", No. 7/1995, p.533
Publication: N. Bolshakov, rf.atnn.ru
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