Transition between a microstrip circuit and a waveguide and outside transmission reception unit incorporating the transition

摘要

The invention proposes a transition 105 between a microstrip technology circuit and a waveguide 103, the waveguide (103) being furnished with a probe 122 linked electrically to the microstrip circuit. The transition comprises at least one first resonant cavity 127 coupled by a first hole 124 placed level with the said plane. The transition furnished with the cavity 127 behaves as a bandstop filter. The transition 105 is placed in an outside unit 1 of a transmission system comprising a transmit circuit embodied in microstrip technology and an antenna of waveguide type. A transmit circuit comprises at least one local oscillator and the resonant cavity 127 is tuned to the frequency of the local oscillator.