Electronically tunable reflectarray element based on C-patch coupled to delay line

• Published in: Electronics letters Vol. 50; no. 16; pp. 1114 - 1116
• Main Authors: Nguyen, Binh Duong, Pham, Kien Trung, Tran, Van-Su, Mai, Linh, Yonemoto, Naruto, Kohmura, Akiko, Futatsumori, Shunichi
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 31.07.2014; Institution of Engineering and Technology; John Wiley & Sons, Inc
• Subjects: Antennas and propagation; Applied sciences; Beams (radiation); Circuit properties; C‐patch coupled; Delay lines; Electric, optical and optoelectronic circuits; electronically beam scanning reflectarray; electronically tunable reflectarray element; Electronics; Exact sciences and technology; Joining; microstrip antenna arrays; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; multilayer printed circuits; Multilayers; Phase shift; PIN diode; PIN diodes; Printed circuits; p‐i‐n diodes; quasilinear phase curve; reflectarray antennas; switchable phase shift; X-band; p-i-n diodes; switchable phase shift; multilayer printed circuits; electronically beam scanning reflectarray; electronically tunable reflectarray element; X-band; reflectarray antennas; PIN diode; C-patch coupled; microstrip antenna arrays; quasilinear phase curve; Validation; Scanning; Phase shift; Coupled line; Phased array; Experimental study; Transmission line; Microwave antenna; Microwave circuit; Printed circuit; Delay line; Antenna array; Multilayered circuit
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.1345

A reflectarray element with switchable phase shift for an electronically beam scanning reflectarray operating in the X-band is presented. The element consists of multilayer printed circuits with a C-patch coupled to a delay line through a ring slot. The phase shift is obtained by adjusting the length of the delay line. The element integrated with a pin diode to control the phase is assembled and measured in the X-band. The experimental validations show a wide range of reflection phase with a quasi-linear phase curve as well as a promising capability of changing the reflected phase between the ON and OFF states of the PIN diode.