论文信息 - Wideband 18–40 GHz Surface Micromachined Branchline Quadrature Hybrid

Wideband 18–40 GHz Surface Micromachined Branchline Quadrature Hybrid

This letter demonstrates two 18-40 GHz rectangular coaxial branchline quadrature hybrids designed using circuit and full-wave simulations. The chosen topologies are fabricated in a surface micromachining technology PolyStrata. Measured in-band performance of baseline wideband branchline hybrid shows |S11|<;-10dB, |S21| = -4.1 ± 1dB, and |S31| = -4.3 ± 0.7 dB. This hybrid is miniaturized by meandering the rectangular coaxial lines to obtain 57% reduction in surface area and in-band performance with |S11| <; -10dB, |S21|= -4.2±1.2dB, and |S31| = -4.1 ± 0.7 dB.

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