Single-Layer Dual-Band Bandwidth-Enhanced Filtering Phase Shifter With Two Different Predetermined Phase-Shifting Values

摘要

In this brief, a dual-band bandwidth-enhanced filtering phase shifter is proposed, which can achieve two different predetermined phase-shifting values with the single-layer structure. The proposed phase shifter is composed of two stub-loaded transmission lines (SLTLs) and two delay lines. The loaded stubs provide three transmission zeros to realize dual-band working and filtering function. Based on the even- and odd-mode network analysis, the theoretical formulas can be obtained. According to the theoretical analysis and design method, several dual-band phase shifters are achieved. A dual-band phase shifter example, which can provide the phase shift of 90 degrees and 270 degrees in two bands, is simulated, manufactured, and measured for demonstration.