Surface-Loaded Ferrite Substrate Integrated Waveguide Switch

Huang, Qiu Dong; Cheng, Yu Jian; Li, Le‐Wei

doi:10.1109/lmwc.2015.2400935

Cited by 17 publications

(9 citation statements)

References 9 publications

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“…Compared to the waveguide switches manufactured from conventional microwave substrates, the presented textile switch shows worse properties. This degradation is dominantly caused by properties of the knitted fabric which was used to replace the microwave substrate.…”

Section: Simulated and Measured Resultsmentioning

confidence: 90%

“…If the ferrite material was excited by the magnetic bias, the cutoff frequency of the ferrite was changed which made the SIW switchable. The fabricated topcontrolled switch 13 had the insertion loss about 1.6 dB and the isolation was about 27 dB. The manufactured sidewallcontrolled switch had the insertion loss about 1 dB, and the isolation was about 20 dB.…”

Section: Introductionmentioning

confidence: 99%

“…That way, the textile‐integrated structure can be reconfigured. When designing such a textile‐integrated switch, concepts implemented by a conventional substrate‐integrated technology can be applied.…”

Section: Introductionmentioning

confidence: 99%

“…Switches loaded by a ferrite were described in References 13 and 14. In Reference , a ferrite pad was placed on the top of the SIW creating a partially filled waveguide. When a magnetic bias was applied, the effective permeability of the ferrite became negative, and the wave was cut off.…”

Section: Introductionmentioning

confidence: 99%

“…When implementing conventional substrate‐integrated switches by textile technologies, specific features of textile‐integrated structures have to be taken into account: manufacturing accuracies are lower, mechanical stability of 3D knitted fabrics is lower, losses of screen‐printed surfaces are higher, variations of electrical and mechanical parameters are wider, and so on. Therefore, the above‐given conventional concepts were simulated and tested from the viewpoint of textile‐related features.…”

Section: Introductionmentioning

confidence: 99%

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Textile‐integrated waveguide switch for ISM band 5.8 GHz

Cupal

Raida

2020

Micro & Optical Tech Letters

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In this article, a textile‐integrated waveguide (TIW) switch designed for the ISM band 5.8 GHz is presented. Conductive surfaces of the switch are manufactured by screen printing using a silver paste, and side walls of the TIW are sewed by a conductive thread. The switch is based on a common TIW T‐divider which is completed by controllable conductive posts in both branches. The controllable posts can be switched from the high‐impedance state to the low impedance state (and vice versa) by connecting or disconnecting them to the conductive layers by PIN diodes. Transmissions of the open branch of the switch and the closed one are |S21| = −1.5 dB and |S31| = −14.9 dB, respectively. If the manufactured switch is completed by transitions from TIW to coaxial line, the transitions of the open branch and the closed one are|S21| = −6.2 dB and |S31| = −15.6 dB, respectively.

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Section: Simulated and Measured Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Textile‐integrated waveguide switch for ISM band 5.8 GHz

Cupal

Raida

2020

Micro & Optical Tech Letters

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Substrate Integrated Multibeam Antennas

Cheng

2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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There is an increasing need for antennas with multiple beam capability to satisfy the growing demand for communication systems and multiple target radars. In the millimeter‐wave frequency band, the power budget is usually costly and difficult to satisfy the requirement for long‐distance and wide‐coverage applications. Therefore, high‐gain, high‐efficient multibeam antennas are necessary for millimeter‐wave systems to improve their performances. An antenna array scheme based on the passive beamforming network (BFN) is an efficient way to form multiple beams in different directions from the same aperture. Depending on simple circuitry and cheap cost, this type of multibeam antenna can be a substitution of passive, active, and digital phased arrays. The currently popular substrate integrated waveguide (SIW) techniques, also called as postwall waveguide or laminated waveguide, combine the best and complementary features of both planar transmission lines and nonplanar waveguides. Thus, it is found very appropriate to construct different high‐frequency circuits and antennas that have been validated by several successful examples. This article presents recent achievements in the development of microwave and millimeter‐wave substrate integrated beamforming networks (BFNs) incorporating both lens‐ and circuit‐based types. They include SIW Butler matrix, Blass matrix, Nolen matrix, Rotman lens, R‐KR lens, reflector lens, and multimode lens. Integrated with proper antennas, compact and on‐substrate multibeam antenna arrays are achieved with good performance. Such a series of SIW BFNs and multibeam antennas present excellent candidates for low‐cost and mass‐reproducible applications in space‐ and ground‐based integrated systems with multiple beam capability.

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