Microwave, Volume 1, Issue 1 (June 2025) – 3 articles

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20 pages, 57469 KiB  
Article
Experimental and Analytical Studies on Electromagnetic Wave Propagation in DC Circuits
by Mingyu Lu and Charan Litchfield
Microwave 2025, 1(1), 3; https://doi.org/10.3390/microwave1010003 - 7 Apr 2025
Viewed by 257
Abstract
It is well known that two pieces of electrical conductors behave as a waveguide when they are employed to transmit AC signals. Some experimental and analytical studies are reported in this paper to demonstrate that two pieces of electrical conductors also behave as [...] Read more.
It is well known that two pieces of electrical conductors behave as a waveguide when they are employed to transmit AC signals. Some experimental and analytical studies are reported in this paper to demonstrate that two pieces of electrical conductors also behave as a waveguide when they are employed to transmit DC signals in practice. Specifically, the speed of wave propagation is measured in the experiments, and the analytical studies are based on the theory of transmission line. Full article
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12 pages, 4905 KiB  
Article
All-Quartz Integrated Lens Antenna for Surface Wave Loss Reduction
by Haoran Zhao, Qi Wang, Wen Yue and Wei Wang
Microwave 2025, 1(1), 2; https://doi.org/10.3390/microwave1010002 - 13 Feb 2025
Viewed by 507
Abstract
This work proposes an all-quartz integrated lens antenna for the first time. The antenna feed and lens materials are both made of quartz. The antenna is designed to work at 26 GHz and has the advantages of small size and reduced surface wave [...] Read more.
This work proposes an all-quartz integrated lens antenna for the first time. The antenna feed and lens materials are both made of quartz. The antenna is designed to work at 26 GHz and has the advantages of small size and reduced surface wave loss. Two antennas, a hemispheric lens and an extended hemispheric lens, are demonstrated. The hemispheric lens has an area of 30 × 30 mm2 and a height of 16 mm, while the extended hemispheric lens, with the same area, has a height of 26 mm. The measured peak gain of the extended hemispheric integrated lens antenna is 15.49 dBi, and the simulated peak gain is 17.68 dBi. The electric-field distribution was analyzed, and two hemispheric lens and extended hemispheric lens antennas of the same size were designed on PCB substrate for comparative analysis. The measured results validate the impact of the surface wave effect on the gain of the lens antenna proposed in this study. Full article
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2 pages, 311 KiB  
Editorial
Microwave—A New Open Access Journal for Microwave Technologies
by Changjun Liu
Microwave 2025, 1(1), 1; https://doi.org/10.3390/microwave1010001 - 9 Jan 2025
Viewed by 700
Abstract
Microwave technologies have long been at the forefront of scientific and engineering innovation, driving advancements in wireless communications, radar, satellites, medical applications, wireless power transfer, and more [...] Full article
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