ANTENTOP- 01- 2012, # 016

Underground Antennas

Bulava

05.08.2012 22:48

About the antenna that is shown on the Figure 6. Inside of the "plate" there is a radiation helix made of from a copper strip.

The antenna is tune up from 1.5- to 30- MHz with help of vacuum capacitors and additional coils... The antenna is working on RX/TX. The "plate" with the antenna parts is filled on by a special plastic.

Figure 6 Underground Antenna

4L1FL

06.08.2012 09:31

There is some more info about the underground antenna "Astra." It had length near 100- meters and width near 30- 40- meters. Antenna was placed above a slope. Decline the slope in to the direction of the directivity of the antenna is near 5- 10 degree. Antenna was made from pieces of coaxial cables in 50 and 75- Ohm. Joining of the cables was insulated by melted polyethylene in special die mold. The ground on it the antenna was sitting should have special parameters. It was coarse sand. The sand was transported to the antenna place for 40- km.

UN-NS

06.08.2012 10:02

Underground antennas were intended for reception in the VLF (Very Low-Frequency waves). System "V'uyga" used the antennas for VLF reception. However since 1980 the system "V'uyga" was used magnetic loop antennas made in Petropavlovsk Factory.

Note I.G.: System "V'uyga" in the ex-USSR Army was used for assured delivery of orders (issued by a man) and signals (issued by some electronic system) to the army divisions. System "V'uyga" duplicated signals and orders that were transmitting by the usual channels of the communication. System "V'uyga" may use radio frequency bands from VLF to UHF.

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