Study On A Novel Millimeter Wave Power Synthesis Scheme

Supported by the National Science Foundation (No.60801004), this paper presents a novel millimeter wave power synthesis scheme based on "TEO11-π resonating system". The power combiner is fabricated with modern packaging technology. And it is consisted of a TEO11circular waveguide resonator cavity, a TE10rectangular waveguide and several λ/4oscillators. The TE011circular waveguide resonator cavity can keep dozens or hundreds of λ/4standing wave oscillators operating with the same phase and frequency simultaneously, so we can combine their high frequency oscillating power together and output through a TE10rectangular waveguide. The contributions of the proposed power combiner are summarized as:small loss, high quality factor, compatible with modern packaging technology, and good extending property, etc. This paper is organized as follows. In Section Ⅰ, Ⅱ, and Ⅲ, we present the concept of the theory of "TEO11-π resonating system" and provide detailed design concept of λ/4standing wave oscillator that applied in the power combiner. The λ/4oscillator can be applied at the high frequency end of MMW band or low frequency end of THz wave band, and comprises two metal via holes punched on wafer level package dielectrics. Short circuited end of the resonator is fabricated by using top level metal of package and open end is connected to active circuit on silicon substrates. A λ/4standing wave oscillator operating at60GHz is illustrated and simulation results of electromagnetic filed distribution around the resonance frequency and Q factor of191at60GHz are obtained from professional electromagnetic simulation tool. Through loading active circuit on the novel resonator in ADS, the waveform and resonance frequency of port oscillating voltage is achieved, it shows that the proposed novel λ/4standing wave resonator can work effectively and features a lower and high quality factor compared with traditional λ/4standing wave resonator with quality factor of about25. Then we give a design example of the power combiner. Simulation results demonstrate the feasibility of the proposed power synthesize technique. Finally, we put forward some existing problems for suggested future works.