| This thesis details the theory and design of a novel Ka-band coupler with unique broadband properties. The coupler consists of a CPW-slotline T-junction with a CPW-lotline transition on either side of the T. One of the transitions is flipped so that a 180° phase shift is created at the output. The phase balance is maintained over a 31.5 GHz bandwidth, from 445 MHz to 32 GHz. The useful bandwidth is limited to 10 GHz due to return loss. The coupler was simulated using Momentum(TM) and Ensemble(TM), and was fabricated using Phillips(TM), OMMIC(TM) ED02AH process.; A single-balanced mixer was designed with an RF frequency of 35 GHz and an IF frequency of 5 GHz using a unique topology to demonstrate one application for the novel coupler. The mixer was simulated using ADS(TM) and fabricated. Experimental data and conclusions are given for both the novel coupler and single-balanced mixer. |
