ANTENTOP- 01- 2014 # 018

Directional Antenna UA6AGW V. 7.00

However I used fixed capacitors at my antenna. So I did tuning of the antenna by changing length of the horizontal wires.

Preliminary Summary: All good features of the prototype antennas (References 1, 2) are not lost at the Antenna UA6AGW V. 7.00. The features are: small dimension, easy to do, interference immunity, ability to operate at small height. Antenna has input impedance 50- Ohm. Antenna bandwidth (at SWR 2.0:1.0, measured by an antenna analyzer) is near 150- kHz. Picture 5 shows scan from the antenna analyzer.

Within ten month Antenna UA6AGW V. 7.00 was tested in the Air. The antenna was compared with Antenna UA6AGW V.40.02 (Reference 4). Picture 6 shows screen shot a SDR- Transceiver. Left picture shows the transceiver with antenna UA6AGW V.40.02 right picture show screen shot with Antenna UA6AGW V. 7.00.

Picture 4 Coupling loop on the Directional Antenna UA6AGW V. 7.00

Picture 5 Data for the Antenna UA6AGW V. 7.00

Antennas were switched through small period of time. Antenna UA6AGW V. 7.00 has the same strength of the reception in main lobe (compare to Antenna UA6AGW V.40.02) however stations going not from main lobe are weak in reception.

Figure 3 shows DD of the Antenna UA6AGW V. 7.00 in horizontal plane. The DD was obtained by measuring of the signal of control transmitter located at distance 1- km from the antenna.

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