Peak Power Handling Capability in Groove Gap Waveguide Filters Based on Horizontally Polarized Resonators and Enhancement Solutions

© 2022 IEEE. Personal use of this material is permitted. Permissíon from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertisíng or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.https://doi.org/10.1109/LMWC.2022.3154060 [EN] This letter studies the peak power handling capability (PPHC) in groove gap waveguide filters based on horizontally polarized resonators. Moreover, a modification of the resonant cavity is proposed, where the central pins of the original structure are replaced by a rounded metal block. As a result of this change, the TE101-like mode can still be excited, but the maximum electric field strength is shifted to the center of the cavity, which leads to a higher PPHC. The main advantages of the original structure are maintained, and greater robustness in the manufacturing process is achieved. Next, some guidelines for the design of the coupling windows and the dimensions of the blocks are shown to minimize the electric field strength and, consequently, maximize the PPHC. Finally, two third-order bandpass filters (with pins and with blocks) centered at 16 GHz have been manufactured and tested in a measurement campaign, where a PPHC enhancement of 8.7 dB at high pressures is achieved for the novel solution presented in this work. This work was supported in part by the University of Alicante through the Fellowship Grant UAFPU2018-054 and in part by MCIN/AEI/10.13039/501100011033 through the Sub-Projects C41 and C43 of the Coordinated Project under Grant PID2019-103982RB. Morales-Hernández, A.; Sánchez-Soriano, MÁ.; Ferrando-Rocher, M.; Taroncher Calduch, M.; Marini, S.; Boria Esbert, VE. (2022). Peak Power Handling Capability in Groove Gap Waveguide Filters Based on Horizontally Polarized Resonators and Enhancement Solutions. IEEE Microwave and Wireless Components Letters. 32(7):859-862. https://doi.org/10.1109/LMWC.2022.3154060