A miniaturized V-band bandpass filter using integrated passive devices technology

A miniaturized and low-insertion-loss V-band bandpass filter implemented on the integrated passive device (IPD) is demonstrated. The architecture is composed of two quarter-wavelength transmission lines with vias, which form the two spiral-type resonators. Then, aperture compensation technique is applied to enhance the coupling between two resonators. The filter exhibits low insertion loss around 1.478dB, return loss around 21.35dB, center frequency at 55.85GHz, FBW about 11%, and extra transmission zeros at 35.1GHz and 61.5GHz. Most important of all, the filter only occupies the area of 342μm × 222μm or 0.071λ_g × 0.046λ_g (excluding the two feeding lines) on the glass substrate. To the authors´ knowledge, this is the most miniaturized filter ever reported for a V-band IPD bandpass filter in the literature.