Microstrip Phase Shifter Using Ground-Plane Reconfiguration

Shafai, Cyrus; Sharma, S.K.; Shafai, L.; Chrusch, D.D.

doi:10.1109/tmtt.2003.821263

Cited by 31 publications

(15 citation statements)

References 4 publications

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“…Therefore, the cost, size, and integration method of the phase shifters are of great concerns [2]. Except for the most popular ferrite phase shifters and diode phase shifters, there has been an increasing interest in phase shifters based on defected microstrip structure (DGS) [3][4][5][6][7]. However, for most of the designs, multi-layer structures and microelectromechanical systems (MEMS) are used, resulting in the high costs, high fabrication complexity, and difficulties in integrating with microstrip systems.…”

Section: Introductionmentioning

confidence: 99%

A compact phase-shifting unit for phased array antennas

Ding

Guo

Qin

et al. 2014

2014 11th European Radar Conference

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A compact reconfigurable defected microstrip structure (RDMS) unit is proposed for phase shifters used in phased array antennas. The RDMS unit can introduce a phase shift when working in two different states. The performance of the RDMS unit, including the phase shift and insertion loss, is found to have closely correlations with some key dimensions, which is elucidated using equations and simulations. A RDMS unit with optimized dimensions is fabricated as an example, and measured to have a phase shift of 20 • at 5.2 GHz. Then, two of such RDMS units are cascaded, resulting in a 1-bit phase shifter which has a doubled phase shift but smaller insertion loss. The proposed phase shifter is compact, low cost, and easy to be fabricated and integrated in microstrip systems. Therefore, it offers a low-cost and low-profile solution to phase shifts in phased array antennas.Index Terms-Reconfigurable defected microstrip structure (RDMS), phase-shifting unit, insertion loss, phased array antennas.

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Section: Introductionmentioning

confidence: 99%

A compact phase-shifting unit for phased array antennas

Ding

Guo

Qin

et al. 2014

2014 11th European Radar Conference

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show abstract

“…Recently, there has been an increasing interest in phase shifters using defected ground plane structure (DGS) [1][2][3][4]. The phase shifter in [1] employed a DGS as a termination load, which increased the phase shift range by 80 • compared with the same structure using a conventional load.…”

Section: Introductionmentioning

confidence: 99%

“…The phase shifter in [1] employed a DGS as a termination load, which increased the phase shift range by 80 • compared with the same structure using a conventional load. In [2], thin-film copper membranes were introduced below the transmission line, which enabled ground plane reconfiguration. By actuating the membranes using high voltages, the space between the transmission line and ground plane were tuned and the line capacitance changed, thus producing a phase shift.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable defected microstrip structure for applications in phase shifter

Ding

Guo

Qin

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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A reconfigurable defected microstrip structure (RDMS) is proposed for phase shift applications. The RDMS unit is made by etching a rectangle slot in a segment of microstrip line and then loading the slot with PIN diodes and capacitors. A phase shift is achieved by switching the diodes between the "on" and "off" states. By cascading such RDMS units, a stepwise phase shifter is realized. The measured results show that the phase shifter is able to achieve phase shifts of 0 • , 44 • , 95 • , and 143 • with a maximum insertion loss of 2.3 dB at 5.2 GHz. The RDMS based phase shifter has a simple fabrication process and is easy to be integrated in microstrip systems, and thus provides a low cost solution to phase control in microstrip antenna arrays.Index Terms-reconfigurable defected microstrip structure (RDMS), phase shifter, phase control.

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“…Specifically, for planar circuits, structures combining PIN diodes [4] or MEMS switches [5] with transmission lines having different phase shifts have mainly been studied. However, there are few reports on phase shifters capable of continuous phase changes.…”

Section: Introductionmentioning

confidence: 99%

A microstrip‐line phase shifter constructed by a tunable filter

Morikawa¹,

Deguchi²,

Tsuji³

et al. 2007

Electron Comm Jpn Pt II

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SUMMARYA phase shifter configuration based on a bandpass filter that can change the phase continuously is discussed. In this configuration, the phase change due to resonance is used by making variable the center frequency of a filter with a broad passband. The configuration consisting of varactor diodes loaded on a microstrip line filter with short-circuited stubs to decrease the insertion loss is studied in detail by analysis and experiment. The possibility of application to a phase shifter is verified.

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Microstrip Phase Shifter Using Ground-Plane Reconfiguration

Cited by 31 publications

References 4 publications

A compact phase-shifting unit for phased array antennas

A compact phase-shifting unit for phased array antennas

A reconfigurable defected microstrip structure for applications in phase shifter

A microstrip‐line phase shifter constructed by a tunable filter

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