Innovations in shortening and expanding the bandwidth of low frequency omnidirectional antennas

Classical low-frequency unbalanced non-suppressed vertical antennas are mainly presented in the form of single-wire quarter-wave vibrators due to the significant size of the antenna elements. In order to reduce the height of antenna-mast structures for such types of antenna systems, electric capacitive shortening is often used in the form of a branched upper part of the antennas from a conductor umbrella. Taking into account the trends in the development of low-frequency transmitting antennas, when considering individual samples and identifying the features of using a combination of loop vibrators in low-frequency ranges, a study of the Pistolcors loop vibrator in capacitive load versions was carried out with the results of applied prospects.

low-frequency loop vibrator, grounded loop vibrator, shortened antenna