A Waveguide Magic-T With Coplanar Arms for High-Power Solid-State Power Combining

Guo, Letian; Li, Jiawei; Huang, Wenzhu; Shao, Hongxia; Ba, Tao; Jiang, Tingyong; Jiang, Yuwei; Deng, Guangjian

doi:10.1109/tmtt.2017.2661741

Cited by 44 publications

(26 citation statements)

References 35 publications

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“…Due to the power capability limitations in SSPAs, power combining techniques have been introduced to combine multiple SSPAs outputs for achieving a high output power . Therefore, different power divider/combiner structures have been developed to achieve a low loss and high power combining efficiency …”

Section: Introductionmentioning

confidence: 99%

“…Power combining techniques mainly use N ‐way structures with different characteristics/configurations to obtain the desired output power. Depending on the desired properties, the existing configurations are classified into two main groups; binary structure (eg, planar microstrip Wilkinson), and parallel structure (eg, radial and spatial combiners) . The conventional planar binary structures such as T‐junction, Wilkinson, branch‐line, and ring coupler can produce good isolation and a broadband power combining with more than 100% fractional bandwidth .…”

Section: Introductionmentioning

confidence: 99%

“…4,7 Therefore, different power divider/ combiner structures have been developed to achieve a low loss and high power combining efficiency. [7][8][9][10][11][12][13] Power combining techniques mainly use N-way structures with different characteristics/configurations to obtain the desired output power. Depending on the desired properties, the existing configurations are classified into two main groups; binary structure (eg, planar microstrip Wilkinson), and parallel structure (eg, radial and spatial combiners).…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the desired properties, the existing configurations are classified into two main groups; binary structure (eg, planar microstrip Wilkinson), and parallel structure (eg, radial and spatial combiners). [6][7][8][9][10][11][12][13][14][15] The conventional planar binary structures such as T-junction, Wilkinson, branchline, and ring coupler can produce good isolation and a broadband power combining with more than 100% fractional bandwidth. [16][17][18] This is due to the fact that in the planar binary structures, the electromagnetic waves propagate in TEM mode.…”

Section: Introductionmentioning

confidence: 99%

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A 200 W broadband high power amplifier using hybrid power combining network and digital level control

Alekajbaf

Masoumi

Mohammad-Taheri

et al. 2020

Int J RF Microw Comput Aided Eng

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In this article, a 2 to 6 GHz solid‐state power amplifier with 53 dBm output power has been analyzed, designed, and fabricated. To achieve a wideband high output power, we introduce a 16‐way hybrid power combiner based on microstrip planar binary and parallel structures. The simulation and measurement results of the proposed hybrid power combining network (PCN) show that the maximum power combining efficiency is around 86% with the insertion loss of around 0.6 to 1.5 dB and an isolation of 20 dB between the ports. Also, to compensate the output power variations due to the thermal and operating frequency changes across the bandwidth, a digital level control (DLC) unit utilizing an agile control algorithm is proposed which decreases the output power variations to 2% of the desired output power. A cooling heatsink fan system has been also designed in order to transfer the heat generated power to the air. The measured output power for the applied input continuous wave is higher than 52.5 dBm. In addition, the power added efficiency (PAE) is better than 15% across the wide portion of the bandwidth and the measured third‐order intermodulation is about 20 dBc (average).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A 200 W broadband high power amplifier using hybrid power combining network and digital level control

Alekajbaf

Masoumi

Mohammad-Taheri

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…Wang and Zheng describe a waveguide power divider with good isolation was realized by using the E-plane folded magic-T structure [3], but the size is large and the structure is complex. Guo et al propose a compact X-band waveguide magic-T which is realized by the E-plane power divider and ridge waveguide coupling structure for high-power solid-state power combining [4], and the isolation between the sum/difference ports and the two input port is better than 40 and 26dB, but the complexity of the combination increase. Guo et al also propose two kinds of four-way power combiners with high degree of isolation [5].…”

Section: Introductionmentioning

confidence: 99%

A Broadband Millimeter-Wave Waveguide Power Divider with High Isolation

Zhang¹,

D²,

Shao³

2019

AJPA

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In this paper, an E-plane stepped-impedance transformer and Y-junction bifurcation are used to form a waveguide power divider with ceramic substrate loaded with thin film resistors. This structure is realized high isolation in V-band by inserting a ceramic substrate at the H-plane center of the Y-junction waveguide bifurcation, both sides of which loaded with thin film resistors. The waveguide power divider was fabricated with aluminium-50% silicon, and has characteristics of light weight, lower coefficient of thermal expansion, good thermal conductivity, and its properties are more compatible with those of ceramic substrate. The principle and design procedure are described in detail. A V-band E-plane waveguide power divider is designed, fabricated, and measured. The measured results show that insertion loss is less than 0.4dB in the frequency range of 50∼60GHz, with typical isolation levels of 25dB between the two output ports and amplitude imbalance less than 0.19dB, phase imbalance less than 1.4°. The measured and simulated results show good amplitude, phase, and isolation characteristics validating the proposed power divider.

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Generalized high‐isolation n‐way Gysel power divider with arbitrary power ratio and different real terminated impedances

Yang³

et al. 2019

Int J RF Microw Comput Aided Eng

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An exact closed-form design approach for a generalized high-power n-way Gysel power divider is proposed. The power divider could be designed to achieve an arbitrary power ratio with the flexible multiway application, arbitrary real terminated impedance, excellent isolation, and easy fabrication through both planar and threedimensional structures. Moreover, this improved power divider could maintain high power processing capacity through the coaxial cavity transmission line and grounding resistances. The exact analytical solutions related to ideal port matching and high isolation are obtained based on the circuit and transmission-line theory.To verify the proposed approach, a compact 3-way coaxial power divider with a pre-designed power ratio of 1:1.5:2 and four different real terminated impedances of 50, 55, 60, and 65 Ω is designed and fabricated. Excellent agreement is achieved between the simulated and measured results. Measurements from 4.7 to 5.7 GHz show that the return losses of all input and output ports are better than 15 dB. The maximum insertion loss is 0.5 dB, and the phase imbalance is approximately less than 6.1 . In addition, the isolation between any two output ports is better than 23 dB from 4.5 to 6 GHz. Meanwhile, the power handling capability can reach the maximum power of the commercial 50 Ω SMA connectors (2.098 kW). K E Y W O R D Sarbitrary power division, arbitrary real terminated impedances, excellent isolation, generalized n-way Gysel power divider, high power

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A Waveguide Magic-T With Coplanar Arms for High-Power Solid-State Power Combining

Cited by 44 publications

References 35 publications

A 200 W broadband high power amplifier using hybrid power combining network and digital level control

A 200 W broadband high power amplifier using hybrid power combining network and digital level control

A Broadband Millimeter-Wave Waveguide Power Divider with High Isolation

Generalized high‐isolation n‐way Gysel power divider with arbitrary power ratio and different real terminated impedances

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