Wideband Substrate‐Integrated Waveguide Six‐Port Power Divider/Combiner

Abstract

A wideband six‐port power divider/combiner with suitable coupling flatness is presented in substrate integrated waveguide (SIW) technology. The structure is composed of six ports that are connected to a common central region. By introducing resonating cavities in each port, the bandwidth and reflection of the SIW six‐port device can be enlarged. Unsymmetrical apertures in lateral port arms are used to increase the isolation between the adjacent input and output ports. A six‐port SIW prototype, operating at 12.5 GHz with 10 percent bandwidth, is designed and fabricated on RT/Duroid 5870 substrate to validate the design process and performance of the proposed power divider/combiner. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2984–2986, 2013

A compact, broadband three-way substrate integrated waveguide power divider with improved isolation

“…The implementation configurations for all the power dividers are six-port coupler except Liu and Xiao (2017). The coupling length of this work compared with Salehi et al (2013), Venanzoni et al (2015), Liu and Xiao (2017) and Guo et al (2019) are much smaller. However, the fractional bandwidth is higher than the above references.…”

Design of seven‐way Bagley power divider with arbitrary output power ratio

“…Those equations will be used in deriving adjacent ports design impedance equations. Those equations are given below; Equations (16)- (20), where, y i = Y i /Y o is the normalized admittance with respect to Y o .…”

“…Examples of advanced analysis of miniaturized BPDs were highlighted in Reference 17 by etching defect ground structures and composite right‐left handed transmission line as in Reference 12. A number of authors have improved designing BPDs by replacing microstrip lines with waveguides, 18,19 substrate integrated waveguide, 5,20,21 and coplanar waveguide 22 . Some authors have also found that BPDs can be used for unequal output power splitting where, several techniques were reported in the literature to address this issue for 3‐way BPD and 5‐way BPD 23‐27 …”

Review of Substrate Integrated Waveguide Circuits for Beam-Forming Networks Working in X-Band

“…Six-port directional couplers are not as common as the four-port counterparts. There are few examples of such devices in the literature [34][35][36]. One reason is that the circuit is quite complex to design.…”

“…The return loss can be further improved by adding more steps or irises in the waveguides connecting SMA ports to the core of the device. This approach was used, for example, in [34,35]. However, this increased the final size of the coupler.…”