@inproceedings{scholars11004, publisher = {Institute of Electrical and Electronics Engineers Inc.}, volume = {2019-D}, journal = {Asia-Pacific Microwave Conference Proceedings, APMC}, title = {Power divider and balun filters with a single cross-coupled quadruplet}, doi = {10.1109/APMC46564.2019.9038415}, note = {cited By 1; Conference of 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019 ; Conference Date: 10 December 2019 Through 13 December 2019; Conference Code:158365}, year = {2019}, pages = {1703--1705}, author = {Lin, C.-H. and Ng, C. L. and Wong, P. W. and Kuo, J.-T.}, isbn = {9781728135175}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85082988450&doi=10.1109\%2fAPMC46564.2019.9038415&partnerID=40&md5=82d680b1e430df7e15a1fe282f182c7a}, keywords = {Bandwidth; Resonators; Transmissions, Circuit size; Coupling coefficient; Cross-coupled; Cross-couplings; Low insertion loss; Power divider; Quadruplet; Transmission zeros, Voltage dividers}, abstract = {A filtering power divider and a filtering balun of fourth-order are synthesized with a single cross coupled quadruplet filter. The entire circuit uses only five resonators and both three-port circuits share four of the five resonators, leading to a compact circuit size and low insertion loss. In synthesis, given bandwidth, in-band return loss and transmission zeros, all coupling coefficients can be determined. For demonstration, a filtering divider and a filtering balun are designed at 2.4 GHz with a bandwidth of 5. Measured responses of the experimental circuits have good agreement with the simulated data, and this validates the synthesis. {\^A}{\copyright} 2019 IEEE.} }