Ka-Band Waveguide Two-Way Hybrid Combiner for MMIC Amplifiers
TBMG-7162
02/01/2010
- Content
The design, simulation, and characterization of a novel Ka-band (32.05±0.25 GHz) rectangular waveguide two-way branch-line hybrid unequal power combiner (with port impedances matched to that of a standard WR-28 waveguide) has been created to combine input signals, which are in phase and with an amplitude ratio of two. The measured return loss and isolation of the branch-line hybrid are better than 22 and 27 dB, respectively. The measured combining efficiency is 92.9 percent at the center frequency of 32.05 GHz. This circuit is efficacious in combining the unequal output power from two Ka-band GaAs pseudomorphic high electron mobility transistor (pHEMT) monolithic microwave integrated circuit (MMIC) power amplifiers (PAs) with high efficiency.
- Citation
- "Ka-Band Waveguide Two-Way Hybrid Combiner for MMIC Amplifiers," Mobility Engineering, February 1, 2010.