Printed Circuit Board Implementation of N-Way Power Combiner With Isolated Input Ports

Abstract

A planar implementation of N-way radial power combiners with isolated input ports is presented. While keeping the design simple, the presented combiner can be manufactured solely using printed circuit board technology, and as a result, has a low weight and manufacturing cost. As proof of concept, two power combiners are designed and built. First, a 6-way combiner working at the center frequency of 3.1 GHz with a fractional bandwidth of around 30% was designed. Our measurements of the fabricated combiner showed an input and output return loss of better than 10 dB in a frequency band of 2.65GHz-3.55 GHz where an isolation of higher than 23 dB, amplitude balance of ±0.1 dB, and phase balance of ±1 degree between the input ports were obtained. Then, a simple approach was implemented to widen the frequency band, achieving a fractional bandwidth of 80%. According to our measurements, the wideband combiner has an operating frequency band of 1.35-3.15 GHz, in which an input and output return loss of better than 10 dB with an isolation of higher than 21 dB, amplitude balance of ±0.15 dB, and phase balance of ±1 degree were achieved.INDEX TERMS Isolation, low cost fabrication, microstrip, N-way power combiner, printed circuit board, wideband, Wilkinson power combiner.

Ultra‐wideband radial space power combiner design

“…The overall design structure of the ridge waveguide power combiner is mainly divided into the following design parts: ridge waveguide input part, ridge waveguide to radial waveguide mode conversion part, and radial waveguide to coaxial output part. [20][21][22][23][24][25] The model is simplified using the equivalent circuit method, and the equivalent model diagram is shown in Figure 1A.…”

A Self-Assembled 3D-Shaped Microstrip Microwave Device Inspired by the Origami Structure

“…Nevertheless, it is difficult to realize thin vertical metal structures through traditional processes. In contrast, a planar metal structure can be easily obtained by numerous methods, such as 3D-printing technology, , silk-screen printing, , and printed circuit board technology. , Therefore, it would be a good choice once a three-dimensional structure could be constructed from a flat structure, which is the characteristic advantage of origami. Besides, compared with 3D-printing technology, origami has the advantages of fast processing speed and no complicated modeling process .…”