An optically controlled microwave matching technique

Safwat, Amr M. E.; Haidar, J.; Khalil, DiaaEldin; Vilcot, A.; Bouthinon, M.; El‐Hennawy, Hadia; Ragaie, H.F.

doi:10.1002/(sici)1098-2760(19960405)11:5<284::aid-mop15>3.3.co;2-9

Cited by 4 publications

(1 citation statement)

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“…Although the reported results primarily focus on switches and applications thereof (e.g. [7] and [9], [12] focus on antennas and matching networks respectively), [13]- [15] have used similar silicon plasma technology to realize variable attenuators.…”

Section: Introductionmentioning

confidence: 99%

A Low-Loss 1-4 GHz Optically-Controlled Silicon Plasma Switch

Fisher

Missen

Semnani

et al. 2021

2021 IEEE 21st Annual Wireless and Microwave Technology Conference (WAMICON)

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This paper presents a low-loss optically-controlled inline RF switch suitable for L-and S-band applications. Under 1.5 W laser power, the switch exhibits a measured ON-state insertion loss of less than 0.33 dB and return loss better than 20 dB across the band. The measured OFF-state isolation ranges from 27 dB at 1 GHz to 17 dB at 4 GHz. The switch comprises a single silicon chiplet excited by a 915-nm laser fiber which creates electron-hole pairs, thereby exciting the ON-state silicon plasma. An optical fiber is guided through the bottom of the RF substrate to illuminate the chiplet, which bridges a 1.075-mm microstrip line gap. To the best of our knowledge, this is the lowest-loss silicon plasma switch demonstrated today.

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Section: Introductionmentioning

confidence: 99%

A Low-Loss 1-4 GHz Optically-Controlled Silicon Plasma Switch

Fisher

Missen

Semnani

et al. 2021

2021 IEEE 21st Annual Wireless and Microwave Technology Conference (WAMICON)

View full text Add to dashboard Cite

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Quasi-static analysis of an optically illuminated directional coupler

Safwat

Khalil²,

El‐Hennawy³

et al. 1997

IEEE Trans. Microwave Theory Techn.

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Indirect optical control of microwave circuits using monolithic optically variable capacitors

Nafra

Jerphagnon

Chavarkar

et al. 1999

IEEE Trans. Microwave Theory Techn.

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In this paper, we present an integrated circuit technology suitable for low-power bias-free optical control of microwave circuits and antennas. We have integrated miniature photovoltaic arrays with varactor diodes and thin-film resistors to form monolithic optically variable capacitors (OVC's). For the monolithic OVC described here, only 1.5 mW of optical power was required for more than 2 : 1 change in capacitance (0.9-0.4 pF). Optically controlled microwave circuits such as X-band analog phase shifters and tunable notch filters, which incorporated the monolithic OVC as the control element, were fabricated to demonstrate the potential of this technology.

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An optically controlled microwave matching technique

Cited by 4 publications

References 0 publications

A Low-Loss 1-4 GHz Optically-Controlled Silicon Plasma Switch

A Low-Loss 1-4 GHz Optically-Controlled Silicon Plasma Switch

Quasi-static analysis of an optically illuminated directional coupler

Indirect optical control of microwave circuits using monolithic optically variable capacitors

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