Compact out-of-Phase Wideband Substrate Integrated Waveguide based Power Divider Loaded by Slots for Ku and K Band Applications

In this paper a novel Substrate Integrated Waveguide (SIW) based single layer ground-loaded compact wideband out-of phase equal power divider is proposed . The wide-band and out-of-phase operation of the proposed power divider is obtained by creating defects in the ground plane with rectangular slots. The Defected Ground Structure (DGS) allows the power divider to exhibit a wide passband. The obtained passband is 11.5 GHz wide considering the return loss better than -10dB. Compactness in the proposed design is attributed to the dispersion characteristic of the slow-wave. The proposed design working in the passband from 14.5 GHz to 26 GHz is fabricated and tested. The size of the proposed design is 0.57 λ
_g
²
excluding feed lines. Here λg is the guided wavelength at free space. The measured amplitude imbalance of (0±1) dB is obtained within the passband. The measured and simulated results are compared and found with in good agreement.