Coupled-line co-directional coupler with inherent harmonic suppression and its wideband implementation

Li, Hongmei; Guan, Mingyao; Wang, Xuejiao; Wang, Zhongbao

doi:10.1016/j.aeue.2021.153854

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…However, it is hard to direct calculation. A better way is to use the optimization method [35] with specifc tolerance limits.…”

Section: Teory Of the Active Integrated Four-feed Networkmentioning

confidence: 99%

“…As Section 2 introduces, optimization technology is preferred for fast calculations. Here, the particle swarm optimization [35] is applied, and the tolerance limits in this design are assigned as given in following equations: After optimization, one group of circuit parameters is obtained, as shown in Table 1. Figure 9 shows the theory results of the designed rat-race coupler.…”

Section: Design Of the Active Integrated Four-feed Networkmentioning

confidence: 99%

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Design of Active Integrated GNSS Antenna Based on the Impedance Transforming Quadrature Four-Feed Network

Wang,

Liu,

et al. 2023

International Journal of Antennas and Propagation

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In the paper, a wideband miniaturized impedance-transforming quadrature four-feed network with a flat output phase difference is presented and applied to the design of an active integrated GNSS antenna where no extra impedance matching circuit is needed. The features of impedance transformation and flat output phase difference are achieved by the proposed miniaturized rat-race coupler. When combining the proposed rat-race coupler with two trans-directional (TRD) couplers, a four-feed network with stable sequential quadrature phase shifts is obtained in the whole GNSS band. Since the quadrature four-feed network has the feature of impedance transformation, integration with a low-noise amplifier (LNA) can be realized without extra impedance matching circuits, which reduce the overall size and losses. For validation, a simple rectangular patch is applied as the radiator, and the active prototype is fabricated. Measurement results show that over the entire GNSS band from 1.164 GHz to 1.610 GHz, the miniaturized integrated antenna exhibits a return loss of more than 10 dB, an axial ratio of less than 3 dB axial ratio, and a gain of greater than 16 dBic.

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“…However, it is hard to direct calculation. A better way is to use the optimization method [35] with specifc tolerance limits.…”

Section: Teory Of the Active Integrated Four-feed Networkmentioning

confidence: 99%

Section: Design Of the Active Integrated Four-feed Networkmentioning

confidence: 99%

Design of Active Integrated GNSS Antenna Based on the Impedance Transforming Quadrature Four-Feed Network

Wang,

Liu,

et al. 2023

International Journal of Antennas and Propagation

Self Cite

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show abstract

“…A short circuit branch line is added to the coupler to enhance the working bandwidth of the unit cell design. A new method of realizing a coupled-line codirectional (CL-COD) coupler is proposed for the first time [3]. The experimental results show that compared with the traditional single section λ/4 branch line coupler, the size of the designed single section CL-COD coupler is reduced by 64.1%, the bandwidth is increased by 13%, and the second harmonic suppression exceeds 20 dB.…”

Section: Introductionmentioning

confidence: 99%

Design of branch line directional coupler for 5G millimeter wave communication

Shen

Lin

Yang

et al. 2022

J. Phys.: Conf. Ser.

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A directional coupler based on a microstrip branch line for 5G millimeter wave communication is designed. The branch line structure is simple and easy to implement. The comprehensive decomposition design method of the microwave system is proposed to improve the design efficiency. Based on the theoretical analysis of microwaves, the design method of combining automatic tuning and manual tuning optimization is used to optimize the schematic simulation. The layout simulation adopts iterative optimization to approximate the design index and reduce the influence of branch line connection loss. Finally, a millimeter wave branch line directional coupler is designed with a bandwidth of 24.25ghz to 27.5ghz, a coupling degree and insertion loss of about 5dB, and an isolation degree of more than 20dB. In the coming 6G, this design method has a certain forward-looking significance.

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A Symmetrical Broadband Tight-Coupled Directional Coupler With High Directivity Using Three-Folded-Coupled Lines

Pan

Wang

et al. 2022

IEEE Trans. Circuits Syst. II

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Coupled-line co-directional coupler with inherent harmonic suppression and its wideband implementation

Cited by 4 publications

References 22 publications

Design of Active Integrated GNSS Antenna Based on the Impedance Transforming Quadrature Four-Feed Network

Design of Active Integrated GNSS Antenna Based on the Impedance Transforming Quadrature Four-Feed Network

Design of branch line directional coupler for 5G millimeter wave communication

A Symmetrical Broadband Tight-Coupled Directional Coupler With High Directivity Using Three-Folded-Coupled Lines

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