CAPACITIVE TWO-RESONANCE ANTENNA Russian patent published in 2019 - IPC H01Q9/04 

FIELD: antenna equipment.

SUBSTANCE: invention relates to antenna engineering and can be used in designing transceiving antenna devices for VHF radio communication equipment of frequency band. Antenna comprises two capacitance elements developed in space, formed by three current-conducting surfaces, one of which is common and grounded, two inductance coils, each of which is connected to its capacitive element so that a system of two coupled oscillatory circuits is formed, tuned to different operating frequencies, and a matching device, two outputs of which are connected to different inductance coils, and the input is connected to a feeder line. At that, each inductance coil is provided with a dielectric threaded nut and a threaded dielectric core with a short-circuited copper ring along the core circumference, which during core rotation moves inside coil, which leads to smooth change of its inductance and enables to fine-tune resonant frequencies of antenna circuits within required limits.

EFFECT: technical result consists in ensuring constancy of structurally specified working frequencies of a capacitive two-resonant VHF antenna when installed on a permanent operation object by enabling their rapid adjustment.

1 cl, 2 dwg