Mm-wave Wideband Dual-Polarized High Suppression Filtenna on LTCC

This paper presents a mm-wave wideband dual-polarized high suppression filtenna on LTCC. Placed on two different substrates, the proposed filtenna is composed of three kinds of patches: driven patches and parasitic patches on the bottom substrate and on the top substrate. The driven patches are fed by four ideal differential ports at the end. Four shorting pins are loaded on the driven patches, respectively. With the shorting pins and specific dimensions, the driven patches can radiate under two modes for wideband. Meanwhile, a radiation null is obtained in low band. The parasitic patches can improve bandwidth and generates the other two radiation nulls in high band. Thus, the proposed filtenna features high out-of-band suppression. The -10dB impedance bandwidth of the proposed filtenna is of 25%, covering from 23GHz to 29.6GHz. The proposed filtenna performs low band and high band suppression greater than 33.5 dB and 27.2 dB, respectively.