Low-loss dichroic filters, a subgroup of frequency-selective components, have been characterized by terahertz time-domain spectroscopy in the region from 0.1 to 3 THz and with Fourier transform spectroscopy. The two data sets are fully consistent. The time-domain spectrometer is used to investigate the phase velocity behavior of dichroic filters. The dichroic filters have various applications i...

In this brief, a novel filtering impedance transformer with good selectivity and high termination is proposed, of which close-formed design equations are derived effectively verified. Then, dual-band dual-output power amplifier (PA) operating at 2.4-2.6 GHz 3.4-3.6 designed based on the proposed transformer. The PA contains diplexer-like output matching network, can separate two band signals in...

In this study, a novel circuit model was proposed for the design of multifunction integrated diplexers with frequency division, selection, and power division functions. The highly multifunctional diplexer mainly comprises only two different-frequency multimode resonators isolation resistors, which results in compact size. distributed coupling technique adopted to integrate resonators. One reson...

A four-port diplexer consisting of two back-to-back three-port diplexers combined with a 180° phase shifter in one branch is presented. The technique achieves high Tx/Rx isolation with relatively low degree filters. Two experimental diplexers are demonstrated, one with equal Q resonators in all filters and the other with dissimilar Q factors, enabling miniaturization and cost reduction. Measure...

The bifurcated E-plane T-junction is presented. Its advantages with respect to waveguide diplexer design are: It allows full E-plane height operation, thus permitting good power handling capability, is simple to model, and provides additional tuning parameters for the computer-aided design. The performance of the junction is compared to those of other junctions and its advantages are demonstrat...