Fulong Chen

Compact Dual-band Bandpass Filter Using HMSIW Resonator and Slot Perturbation

A compact dual-band filter using half-mode substrate integrated waveguide (HMSIW) resonators is presented in this letter. Dual-band response is achieved by the quasi-TEM mode and the TE102 mode of the novel HMSIW resonator. Slotline perturbation is introduced to adjust the resonant frequency of the TE102 mode, while it has little effect on the performance of the quasi-TEM mode. Source-load coupling is utilized to obtain good selectivity and high out-of-band rejection. A dual-band filter is designed, fabricated and measured to demonstrate the proposed method. The simulated and measured results show reasonable agreement.

Synthesis and design method of bandpass-response power divider

A synthesis and design method has been presented for the power divider with bandpass filtering response in this paper. The coupling resonance theory is used to analyze the N-way bandpass-filtering power divider. The synthesis theory of multi-port coupling resonant circuit is given, and a T-type topology structure model of the power divider with filtering performance is proposed based on the theory. Meanwhile, relevant analysis and design formula are deduced on the basis of the model. The electrical characteristics of filtering power divider model are verified according to the theoretical simulation analysis of the equipower division and unequal power division of the 9th filtering power divider. Then the X-band 4th filtering power divider based on substrate integrated waveguide (SIW) is designed and tested to verify the correctness of the theory.

Wideband millimetre-wave four-way spatial power combiner based on multilayer SIW

A hybrid rectangular waveguide/multilayer substrate integrated waveguide (SIW) spatial power divider/combiner has been presented. The rectangular waveguide/four-layer SIW transition is applied to implement the four-way power-dividing/combining function. A millimetre-wave four-way multilayer-SIW power divider/combiner is designed, fabricated and measured. The measured 15 dB return loss and 3 dB insertion loss bandwidth are demonstrated from 29 GHz to 37 GHz.

Broadband six-way out-of-phase SIW power divider

A broadband six-way out-of-phase substrate-integrated waveguide (SIW) power divider was designed, analyzed, and fabricated for low loss and out of phase dividing applications. The SIW technology was used to realize the power divider; where it consists of a central dual-disc probe connected with coaxial outer-conductor impedance matching transformer and six SIW-to-microstrip transitions as output probes. Three of the SIW-to-microstrip transitions are located at the top plane, whereas the other three are at the bottom plane of the power divider to achieve the out-of-phase dividing functioning. These transitions are all the same in size and shape for symmetry reason. Good transmissions from coaxial input port to six-way SIW power divider were also achieved. There is a reasonable agreement between measured and simulated results.