Abstract
In this paper, a three-dimensional (3-D) low-loss and wideband BPF based on lowtemperature co-flred ceramic (LTCC) has been presented for 60GHz wireless communication applications. Via pads in the vertical via transitions are designed as an additional resonator for lowloss and wide-bandwidth of the BPF. The proposed BPF has been designed by investigating its characteristics as a function of dimensions of the resonators such as a single-mode patch and via pads and also a length of feed lines are optimized for efiective coupling. The designed BPF was fabricated in a 6-layer LTCC dielectric. The fabricated BPF shows a centre frequency (fc) of 61.46GHz and a 3dB bandwidth of 10.5% from 58.2 to 64.7GHz (6.47GHz). An insertion loss of i2.88dB at fc and return losses below i10dB are achieved. Its whole size is 4:72 £ 1:7 £ 0:684mm 3 .
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