| 摘要 |
FIELD: physics, radio. ^ SUBSTANCE: invention concerns electric radiotechnics, particularly dielectric-filled loop antenna intended for operation in the band over 200 MHz featuring multiple tuning frequencies within work frequency band. Antenna includes cylindrical dielectric core, feeder construction passing through the core along its axis, balance unit in the form of hose enveloping one core end, and spiral antenna elements running from power point of feeder construction at the opposite core end to balance unit edge. Antenna elements are designed as a couple of opposite groups of extended spiral elements, where each element includes at least first and second conducting elements of different electric length forming multiple conductive loop channels. Additional resonance modes are obtained due to shaping at least one conductive element in each group in the form of conductive strip with one or both ends curved so that strip ends are not parallel and have different electric length. ^ EFFECT: improved bandwidth. ^ 19 cl, 11 dwg |
