Rectangular Waveguide Phase Shifter Using PTFE Plates Oriented at the Brewster Angle

Rectangular Waveguide Phase Shifter Using PTFE Plates Oriented at the Brewster Angle | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Electronics Letters This is a preprint and has not been peer reviewed. Data may be preliminary. 12 May 2026 V1 Latest version Share on Rectangular Waveguide Phase Shifter Using PTFE Plates Oriented at the Brewster Angle Authors : Alejandro Trejo Leon 0009-0001-1781-9819 [email protected] , Fabiola Martínez Zúñiga [email protected] , Alberto Benavides Cruz [email protected] , and Jorge Sosa Pedroza [email protected] Authors Info & Affiliations https://doi.org/10.22541/authorea.15003131/v1 16 views 5 downloads Contents Abstract Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract This letter presents the design and experimental validation of a low-cost rectangular waveguide phase shifter based on polytetrafluoroethylene (PTFE) dielectric slabs. The device is implemented in a non-standard aluminum waveguide operating in the TE_10 mode in the 2.6–3.95 GHz frequency range. The dielectric constant of PTFE was determined experimentally using a modified Nicolson–Ross–Weir (NRW) method, yielding a relative permittivity of 1.98. Phase shifting is achieved by inserting five PTFE samples with arbitrarily selected lengths at 3.1 GHz. To minimize reflections due to dielectric discontinuities, the slabs were cut considering the Brewster angle (55°) at the design frequency. S-parameter measurements confirm the proper functioning of the non-standard waveguide, with |S11|=|S22|<−13 dB across the entire frequency range and an insertion loss of |S21|=|S12|=−0.9 dB. The measured phase shifts agree with the theoretical values, with deviations below 2°, demonstrating a simple and low-cost alternative for antenna feed networks and microwave systems. Information & Authors Information Version history V1 Version 1 12 May 2026 Collection Electronics Letters Keywords antennas Antennas and Propagation antenna testing antenna theory waveguides waveguide theory Microwave Technology millimetre wave filters microwave antennas microstrip filters microwave filters phase shifters permittivity measurement waveguide components dielectric-loaded waveguides Microwave Technology millimetre wave filters microwave antennas microstrip filters microwave filters antennas Antennas and Propagation antenna testing antenna theory waveguides waveguide theory Authors Affiliations Alejandro Trejo Leon 0009-0001-1781-9819 [email protected] Instituto Politecnico Nacional, Mexico City, Mexico View all articles by this author Fabiola Martínez Zúñiga [email protected] Instituto Politecnico Nacional, Mexico City, Mexico View all articles by this author Alberto Benavides Cruz [email protected] Instituto Politecnico Nacional, Mexico City, Mexico View all articles by this author Jorge Sosa Pedroza [email protected] Instituto Politecnico Nacional, Mexico City, Mexico View all articles by this author Metrics & Citations Metrics Article Usage 16 views 5 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Alejandro Trejo Leon, Fabiola Martínez Zúñiga, Alberto Benavides Cruz, et al. Rectangular Waveguide Phase Shifter Using PTFE Plates Oriented at the Brewster Angle. Authorea . 12 May 2026. DOI: https://doi.org/10.22541/authorea.15003131/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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