Switched beam antenna based on RF MEMS SPDT switch on quartz substrate

• This letter demonstrates a 20-GHz radio frequency  microelectromechanical system (RF MEMS)-based electrically switchable   antenna on a quartz substrate. Two quasi-Yagi antenna elements are   monolithically integrated with a single-pole double-throw (SPDT) MEMS   switch router network on a 21 mm x 8 mm chip. Electrical beam steering   between two opposite directions is achieved using capacitive MEMS SPDT  switches in the router. Port impedance and radiation patterns are studied numerically and experimentally. Measured results show that the   switched beam antenna features a 27% impedance bandwidth (S-11 = -10   dB), a gain of 4.6 dBi, and a front-to-back ratio of 14 dB at 20 GHz   when the control voltage is applied to one of the switch pairs of the SPDT switch.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Keyword

Front-to-back ratio

half-power beamwidth (HPBW)

quasi-Yagi antenna

radio frequency microelectromechanical system (RF MEMS)

single-pole double-throw (SPDT) switch

Signal processing

Signalbehandling

Engineering Science with specialization in Microwave Technology

Teknisk fysik med inriktning mot mikrovågsteknik

Publication and Content Type

ref (subject category)

art (subject category)