Tunable composite right/left-handed transmission line with positive/negative phase tunability using integrated MEMS switches

Hwang, Seung-won; Jang, Taehee; Bang, Yong-Seung; Kim, Jong-Man; Kim, Yong-Kweon; Lim, Sungjoon; Baek, Chang-Wook

doi:10.1109/memsys.2010.5442296

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Compared to [9], the proposed CRLH TL has variable components both in series and in shunt, resulting in improved tuning range. A basic device concept and preliminary results were presented previously [10]. In this paper, more details on the phase shifter design concept and its verification by circuit and electromagnetic (EM) simulations including electric field distributions are discussed.…”

Section: Introductionmentioning

confidence: 99%

MEMS-tunable composite right/left-handed (CRLH) transmission line and its application to a phase shifter

Hwang¹,

Jang²,

Kim³

et al. 2011

J. Micromech. Microeng.

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This paper reports a novel compact tunable composite right/left-handed transmission line (CRLH TL) with multi-state phase tunability using integrated microelectromechanical system (MEMS) switches and its application to a phase shifter. It is possible to select multiple states with different positive/negative phase responses. The phase states can be determined by controlling the admittance of capacitors and impedance of inductors through MEMS switch operations. The designed devices are analyzed using electromagnetic and circuit simulations. The propagation characteristics and phase lead/lag properties of the devices are investigated. The designed device can be operated as a 90 • /−90 • phase tunable CRLH TL at 8 GHz and a four-state phase shifter at 9.5 GHz by switch configuration. At 8 GHz, the phase responses of the device were 87 • of the phase lead and −80 • of the phase lag for the left-handed (LH) and right-handed (RH) states, respectively. At 9.5 GHz, the phase of each state varies among 26.7 • , 14.6 • , −6.7 • , and −11.5 • , where the first two states are in the LH region and the others are in the RH region. At 9-15 GHz, insertion losses are measured to be <2.6 dB, and return losses are >10 dB.

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Section: Introductionmentioning

confidence: 99%

MEMS-tunable composite right/left-handed (CRLH) transmission line and its application to a phase shifter

Hwang¹,

Jang²,

Kim³

et al. 2011

J. Micromech. Microeng.

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show abstract

“…Using a delay [1,[11][12][13] or periodically loaded line [1,8] CPW phase shifters have been developed and also right-handed (all-pass network) [6], left-handed [9,10], and reflection-type [5] phase shifters using tunable capacitors have been also reported. Recently composite right/left-handed transmission metamaterials [14] have been utilized for the phase shifter applications. A 3-stage LC-ladder-type phase shifter [7] with BST thin film capacitors of the CPW line was designed.…”

Section: Introductionmentioning

confidence: 99%

“…CPW phase shifters on the different substrates were researched. Their phase differences were less than 10 degrees at 100 V. Recently a phase shifter using MEMS switches [14] was presented. In the case of almost CPW line phase shifter, very high DC voltage (20 ∼ 150 V) was required for designed phase difference and some cases showed bulky size.…”

Section: Introductionmentioning

confidence: 99%

Tunable Coplanar Waveguide (Cpw) Line Integrating Bismuth Zinc Niobate (Bzn) Thin Films

2010

PIER Letters

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In this paper, a tunable coplanar waveguide (CPW) line using the bismuth zinc niobate (BZN) thin film has been proposed and demonstrated for low-voltage phase shifter applications. In order to reduce the operation bias voltage the air gaps between the signal strip and ground plane are filled with the tunable thin films. At low E-fields of 1.3 kV/cm, the fabricated CPW line shows the phase difference of 10 degree at 10 GHz.

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Tunable composite right/left-handed transmission line with positive/negative phase tunability using integrated MEMS switches

Cited by 2 publications

References 8 publications

MEMS-tunable composite right/left-handed (CRLH) transmission line and its application to a phase shifter

MEMS-tunable composite right/left-handed (CRLH) transmission line and its application to a phase shifter

Tunable Coplanar Waveguide (Cpw) Line Integrating Bismuth Zinc Niobate (Bzn) Thin Films

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