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2022 | OriginalPaper | Buchkapitel

6. Micromachined Phase Shifters

verfasst von : Shiban Kishen Koul, Sukomal Dey

Erschienen in: Micromachined Circuits and Devices

Verlag: Springer Singapore

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Abstract

A radio frequency micromachined based phase shifter is one of the key components in a modern electronically steerable phased array for satellite communication, radar systems and high precision instrumentation. The phase shifter controls the signal phase to steer the direction of the beam. MEMS technology provides a superior performance in terms of low loss, low power consumption and excellent linearity compared to other technologies. MEMS based digital phase shifters provide a large phase shift and low sensitivity to electrical noise with a high tuning ratio compared to analog versions. This Chapter describes different types of TTD phase shifters utilizing MEMS switches and MEMS varactors. A gold-based surface micromachining process is used to develop different kinds of MEMS phase shifters on alumina (εr = 9.8) substrates. All phase shifters are implemented using coplanar waveguide (CPW) transmission lines and actuated by electrostatic actuations. These include the analog type Distributed MEMS Transmission Line (DMTL) phase shifter using push–pull actuation, a 5-bit DMTL phase shifter using MEMS bridge and a fixed capacitor, 5-bit switched line phase shifter using DC-contact MEMS switches and a 2-bit & 5-bit phase shifter using MEMS SP4T and SPDT switches. This Chapter includes details on the design, development, and characterization of MEMS phase shifters. Furthermore, all experimental results are validated with a circuit analysis and full-wave EM simulation.

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Zurück zum Zitat Koul SK, Dey S, Poddar AK, Rodhe U (2016)Micromachined switches and phase shifters for transmit/receive module applications. In: 46th IEEE European microwave conference (EuMC-2016), London, United Kingdom Koul SK, Dey S, Poddar AK, Rodhe U (2016)Micromachined switches and phase shifters for transmit/receive module applications. In: 46th IEEE European microwave conference (EuMC-2016), London, United Kingdom
65.
Zurück zum Zitat Dey S, Koul SK, Poddar AK, Rohde UL (2017)Ku-V-band 4-bit MEMS phase shifters using high isolation SP4T switches and DMTL structures. J Micromech Microeng 27(10):10 Dey S, Koul SK, Poddar AK, Rohde UL (2017)Ku-V-band 4-bit MEMS phase shifters using high isolation SP4T switches and DMTL structures. J Micromech Microeng 27(10):10
Metadaten
Titel
Micromachined Phase Shifters
verfasst von
Shiban Kishen Koul
Sukomal Dey
Copyright-Jahr
2022
Verlag
Springer Singapore
DOI
https://doi.org/10.1007/978-981-16-9443-1_6

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