Spectral Domain Analysis of a Coupled Slot Antenna

摘要

The recent trend in the monolithic microwave and millimeter-wave integrated circuit technology is toward the integration of different components in a compact manner for cost and fabrication considerations. One such example is the integration of a receiving antenna and a balance mixer using as lot-ring structure. A similar structure involving a coupled slot antenna has recently been proposed. This new structure takes advantage of the intrinsic isolation between the lowest order even and odd modes in a coupled slot. Therefore, the incoming RF signal is carried by the even mode and is isolated from the local oscillator signal in the odd mode before mixing is achieved by Schottky diodes placed at appropriate places in the slots. The characteristics of a coupled slot resonator suitable for novel design of an integrated planar antenna are analyzed. The analysis is based on the spectral domain emittance matrix approach, and all the wave phenomena associated with the structure are incorporated. The resonant frequencies in the even and odd resonance modes are evaluated from the numerical solution of the characteristic equation. The radiation patterns are also calculated. Some numerical results are compared with experimental data. Reprints.