SLOT ANTENNA WITH A COMBINED BANDPASS/BANDSTOP FILTER NETWORK

摘要

A slot antenna with a filter network is provided. The slot antenna is connectable to an antenna feed, and configured to resonate at a first frequency when surface current from the antenna feed flows around the slot antenna, the slot antenna comprising a first side and a second side separated by a width. A filter network bridges the first side and the second side, across the width, at a given position from a surface-current-originating end of slot antenna, the filter network configured to: electrically isolate the first side from the second side at the first frequency so that a length of the slot antenna defines a resonant length of the slot antenna at the first frequency; and, electrically connect the first side to the second side at a second frequency higher than the first frequency, so that the surface current flows across the filter network at the given position.

主权项

1. An antenna comprising:
a ground plane; a slot antenna in the ground plane, the slot antenna connectable to an antenna feed, and configured to resonate at a first frequency when surface current from the antenna feed flows around the slot antenna, the slot antenna comprising a first side and a second side separated by a width; and, a filter network bridging the first side and the second side, across the width, at a given position from a surface-current-originating end of slot antenna, the filter network configured to:
electrically isolate the first side from the second side at the first frequency so that a length of the slot antenna defines a resonant length of the slot antenna at the first frequency; and,electrically connect the first side to the second side at a second frequency higher than the first frequency, so that the surface current flows across the filter network at the given position, thereby shortening the resonance length of the slot antenna and the slot antenna resonates at the second frequency.