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Return loss

About: Return loss is a research topic. Over the lifetime, 11090 publications have been published within this topic receiving 97603 citations.


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Journal ArticleDOI
TL;DR: In this paper, a broadband travelling-wave substrate integrated rectangular waveguide (SIRW) power divider using a dual-disk probe is presented, and the measured isolations between the output ports are as low as 10 dB at the entire C-band.
Abstract: A broadband travelling-wave substrate integrated rectangular waveguide (SIRW) power divider using a dual-disk probe is presented. The central dual-disk probe provides a broadband input match for the travelling-wave SIRW power divider. The detailed design, simulation, fabrication, and measurements of a C-band four-way SIRW power divider are discussed. Measured results agree well with the simulated results. The measured 10 dB return loss bandwidth of this power divider is about 4.4 GHz and its 1 dB insertion loss bandwidth 4.3 GHz. The measured isolations between the output ports are as low as 10 dB at the entire C-band.

35 citations

Proceedings ArticleDOI
01 Jan 2013
TL;DR: In this paper, a low-loss fan-out for 12-core multicore fiber was proposed, which achieves physical contact connection between coupled cores by accurately arranging fibers and optimizing the conditions for physical contact.
Abstract: We propose a low-loss fan-out for 12-core multicore fiber, which achieves physical-contact connection between coupled cores by accurately arranging fibers and optimizing the conditions for physical contact, and demonstrate a physical contact connection with a low average insertion loss of 0.64 dB and a high return loss of over 55 dB for 12 cores.

35 citations

Journal ArticleDOI
TL;DR: In this article, a 2-bit Ka-band RF MEMS frequency tunable slot antenna is demonstrated on a fused silica wafer using a micro-fabrication process requiring six masks.
Abstract: A 2-bit Ka-band RF MEMS frequency tunable slot antenna is disclosed. It is demonstrated on a fused silica wafer using a micro-fabrication process requiring six masks. The return loss and gain for each of the four states are measured using a probe station based setup for on-wafer antenna measurements. The antenna has a measured tunable bandwidth of 6.8 GHz. The average measured gain is 1.74 dBi, and the average measured cross-polarization is -9.22 dBi. The extracted switching time is 5.19 mus for a drive voltage of 45 V.

35 citations

Journal ArticleDOI
TL;DR: In this paper, a microstrip Rotman lens is used to feed a wide bandwidth series-fed microstrip patch antenna array, which has five beam ports, five array ports, four dummy ports and a footprint as small as 11 mm $\times10.7$ mm at 60 GHz operation frequency.
Abstract: This paper presents a new design technique and analysis for a microstrip Rotman lens which is feeding a wide bandwidth series-fed microstrip patch antenna array. In the proposed Rotman lens method, the length of the transmission lines does not affect the progressive phase delay. This reduces the complexity of the design and improves the performance parameters. An antenna array is utilized using open ended $\lambda /4$ stubs to support high gain, directivity, and a wide bandwidth. The Rotman lens and antenna arrays are fabricated on the top layer of a multilayer low temperature cofired ceramic substrate. The Rotman lens has been designed based on the presented technique, which has five beam ports, five array ports, four dummy ports, and a footprint as small as 11 mm $\times10.7$ mm at 60 GHz operation frequency. The implemented lens and antenna array exhibits good insertion loss, return loss, and wide bandwidth and shows phase error as small as 0.45° in the worst case scenario.

35 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed the design of circulators based on spoof surface plasmon polaritons (SSPP), where the center conductor is replaced with a blade structure that supports the SSPP mode and exhibits a shorter wavelength and larger wave vector.
Abstract: In the letter, we propose the design of circulators based on spoof surface plasmon polaritons (SSPP). Rather than striplines, the center conductor is replaced with a blade structure that supports the SSPP mode and exhibits a shorter wavelength and larger wave vector. To enhance the efficiency, a matching transition is employed between the coplanar waveguide and the blade structure. With biased ferrites attached on both the top and bottom sides, the blade structure shows good nonreciprocal properties. The simulation results indicate that in the 5.0-6.6 GHz frequency range, the isolation and return loss reaches 15 dB and the insertion loss is less than 0.5 dB. Since the circulator utilizes the SSPP mode, which exhibits a shorter wavelength than its analogous stripline mode, the size of ferrites, and thus the size of the circulator, can be reduced. Our work provides an effective route to the design of compact, broadband circulators.

35 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023285
2022837
2021601
2020738
2019970
2018994