Design and Implementation of an Ultra-Wideband Six-Port Network

Abstract

Abstract-This paper presents a six-port network over an ultrawideband (UWB) of 2-8 GHz. Its key component is the six-port junction, which consists of a Wilkinson power divider and three 3-dB quadrature couplers. This six-port junction is accomplished in a low dielectric constant substrate (Rogers RT/duroid 5880). Multi-section impedance transformation is applied in the power divider, and the quadrature coupler is realized by using two 8.34 dB couplers in tandem. An ultra-wideband operation of the six-port junction is verified by full electromagnetic simulations and measurements. The results show that the designed devices exhibit good performance across 2-8 GHz band: the return losses at input ports are higher than 15 dB, the insertion losses from input ports to the remaining ports are 7.2 dB ± 1.7 dB, the isolation between two input ports is greater than 20.5 dB, and the maximum phase difference compared with the theoretical behavior between two test ports is 10 • . For the manufactured six-port junction, a six-port phase measurement system and a calibration technique based on support vector regression (SVR) are introduced. Results show that the SVR model can achieve a mean phase error of 1.5274 • .

An Improved Uwb Non-Coplanar Power Divider

“…The input and output ports of these power dividers are coplanar. However, it is not suited to use in some fields, such as the six-port junction [13][14][15] including non-coplanar couplers [16][17][18]. In addition, the six-port technique is a suitable option as the ratio of complex amplitude measurements [19], and has been applied in many fields [20][21][22][23].…”

Compact Uwb Multilayer 3 Db Directional Coupler Design And Analysis on Coupler Performances

“…Since the news of the ultra‐wideband frequency that cover between 3.1 and 10.6 GHz that has been allocated by Federal Communication Commission spreads in February 2002 , a lot of application for the communication and radar system is being investigated. This has influenced the excessive increment of the design approach for the directional couplers design . Where, directional couplers are among the most well‐known passive devices that have widely been used in microwave subsystems, such as in beam‐forming network, modulators, and balanced mixers .…”

Miniaturized 0.3-6 GHZ LTCC Six-Port Receiver for Software Defined Radio

“…Moreover, the proposed LTCC sixport receiver not only outperforms the other receivers in these aspects, but also in terms of size: 30 × 30 × 1.25 mm. Other multilayer [20][21][22] or miniaturized microstrip [23] six-port designs have appeared in the literature. Nonetheless, they do achieve neither such a reduced size nor such large frequency range than the proposed LTCC sixport receiver.…”