Portable amateur radio antenna VHF / UHF / HF switchable transmit and receive antenna

Abstract

The claim for protection is based on the fact that after a one-time setup, the desired transmission and reception frequencies of the antenna are put into operation without mechanical dismantling by using the respective switches / switching connections, a “monoband antenna”. The main feature, however, is that you do not have to add or remove any components and you can still use the frequencies 433 MHz (70cm), 145 MHz (2m) and the shortwave bands 28 MHz (10m), 24 MHz (12m), 21 MHz (15m), 18 MHz (17m), 14 MHz (20m), 10.1 MHz (30m), 7 MHz (40m) and 3.5 MHz (80m) with one setup. This principle “blocks out” unwanted reception frequencies and only allows desired frequencies to pass through. This makes the received signals easier to understand and reduces noise. The broadcast behaves similarly. The radiation power is in the 50 ohm range, but can be individually adjusted to 75 ohms as desired by the user.

Description

[0001] A 2-pole antenna made of twisted stranded cable with a conventional antenna cable feed point. The transmitting element (+) and the opposite pole (-) each contain switches / switch connections that switch the desired frequencies on or off.

[0002] With this invention, it is achieved that, instead of several antennas, with the structure of only "one antenna", as in the requested claim 9, monoband antennas can be operated with the unchanged mechanical complete length.

Claims

[1] The claim for protection is based on the fact that after a one-time setup, the desired transmission and reception frequencies of the antenna are put into operation without mechanical dismantling by using the respective switches / switching connections, a “monoband antenna”. The main feature, however, is that you do not have to add or remove any components and you can still use the frequencies 433 MHz (70cm), 145 MHz (2m) and the shortwave bands 28 MHz (10m), 24 MHz (12m), 21 MHz (15m), 18 MHz (17m), 14 MHz (20m), 10.1 MHz (30m), 7 MHz (40m) and 3.5 MHz (80m) with one setup. This principle “blocks out” unwanted reception frequencies and only allows desired frequencies to pass through. This makes the received signals easier to understand and reduces noise. The broadcast behaves similarly. The radiation power is in the 50 ohm range, but can be individually adjusted to 75 ohms as desired by the user.