Radiation from a Gap Cut Across the Conducting Strip of a Double Shorted Microstrip Resonator

A double shorted linear microstrip resonator symmetrically loaded with a gap is used to investigate the radiation from the gap. Gap will only radiate in odd modes and its radiation can be predicted using far field approach. Measured properties of the gap using pdd and even modes of resonances gave results which are very close to the theoretical values up to 18 GHz. Resonator construction, ways of reducing short circuit radiation use of the resonator as a) a measurement set up and b) a micros trip antenna are given.