60-GHz thin broadband high-gain LTCC metamaterial-mushroom antenna array
Wei Liu, Zhi Ning Chen, Xianming Qing
IEEE Transactions on Antennas & Propagation
vol. 62, no. 9, Sep. 2014
Low profile, low temperature cofired ceramic
(LTCC),metamaterial, millimeter wave antenna array,mushroom
antenna, mutual coupling, substrate integrated waveguide (SIW),
surface wave, wideband, 60 GHz
A low-profile broadband metamaterial-mushroom antenna array is proposed for high-gain 60-GHz band applications. The antenna array consists of a single-layer mushroom radiating structure and a simplified single-layer substrate integrated waveguide (SIW) feeding network. A new transmission-line based model is presented to estimate the resonant frequencies of the operating and antiphase modes. With the
metamaterial-mushroom structure, the closely-placed antenna
elements realize less mutual couplings, higher aperture illumination
efficiency compared to conventional patch antennas. An 8 x 8 mushroom antenna array is designed and prototyped using low-temperature cofired ceramic (LTCC), the measurement shows the antenna array with the feeding transition proposed an impedance bandwidth of 56.3–65.7 GHz with a boresight gain greater than 21.2 dBi and up to 24.2 dBi at 62.3 GHz. The proposed antenna array features the merits of high gain, broadband, compact size, and low cross-polarization levels.
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