A novel 3D cavity diplexer with compact size using LTCC technologies for V-band wireless communication systems

Abstract

In this article, a novel concept of 3D integrated V-band diplexer, which permits the realization of compact size using a dual-mode cavity and four single-mode cavities, has been realized in low-temperature cofired ceramic technologies. The dual-mode cavity resonator acting as one resonator for both Rx and Tx filters is developed to generate two resonant modes (TE 102 and TE 103 ) at the center frequency of Rx (56.5-58.5 GHz) and Tx (64-66 GHz) channels, separately. Meanwhile, this dual-mode cavity becomes the interconnect between Rx/Tx channels and help to realize good isolation without using conventional T-junction. In the measurement, each filter designed for Rx and Tx channels exhibits excellent performance. Channel-to-channel isolations better than 35 dB across the Rx band and better than 32.5 dB across the Tx band are also obtained.

Self-diplexed antenna based on loading asymmetric grounding-vias

“…In the past few years, diplexing wireless communication systems have been greatly developed due to the provided extra functionality and compactness . In particular, transmitting and receiving signals from uplink and downlink channels, respectively, are in adjacent frequency bands.…”

“…In the past few years, diplexing wireless communication systems have been greatly developed due to the provided extra functionality and compactness. [1][2][3][4] In particular, transmitting and receiving signals from uplink and downlink channels, respectively, are in adjacent frequency bands. The key component of a conventional diplexing communication system is the diplexer, a three-port device connecting the transmitter and receiver to the common antenna, as shown in Figure 1.…”