Modular 20kW solid state RF amplifier for Indus-2 syncrotron radiation source

Jain, Akhilesh; Hannurkar, P.R.; Sharma, Deepak Kumar; Gupta, Alok Kumar; Tiwari, Ashish K.; Lad, M.; Kumar, Ramesh; Badapanda, M.K.; Gupta, Pooja

doi:10.1016/j.nima.2012.02.023

Cited by 15 publications

(9 citation statements)

References 7 publications

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“…At the low power, vector measurement in terms of scattering parameters, was carried out using network analyzer E5071B. For the high-power measurement, a solid-state RF amplifier at 20 kW, developed in-house [48], was utilized. In an ideal combiner, the amplitude and phase of the RF signal, fed from the main port, should get distributed uniformly among the branch ports.…”

Section: Experimental Investigation and Measured Resultsmentioning

confidence: 99%

“…For the prolonged time testing, this combiner was tested using an in-house developed solid-state amplifier [48] at 16 kW RF power for more than 7 h. After this test, no any degradation in RF performance was observed. Finally in the series of these experiments, for safety purpose, the radiation level was measured outside the combiner.…”

Section: Experimental Investigation and Measured Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Design and analysis of a high-power radial multi-way combiner

Jain

Gupta

Sharma

et al. 2013

Int. j. microw. wirel. technol.

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In this paper, the design analysis of a multi-way and high-power radial combiner is presented. This combiner incorporates a rigid stripline-type combining structure. This analysis, based on an equivalent circuit model and segmentation of the radial transmission line, provides simple design formulae. The developed methodology, after fine-tuning with the help of an electromagnetic full-wave simulator, is physically demonstrated by developing a high-power (16 kW average) and high combining-efficiency (98.9%) 16-way combiner at the center frequency of 505.8 MHz. Its efficient and repeatable performance, fabrication-friendly structure, and absence of the heat-related problem, caused by the isolation resistor, are the main features of this design.

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Section: Experimental Investigation and Measured Resultsmentioning

confidence: 99%

Section: Experimental Investigation and Measured Resultsmentioning

confidence: 99%

Design and analysis of a high-power radial multi-way combiner

Jain

Gupta

Sharma

et al. 2013

Int. j. microw. wirel. technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The output stage is the most key model of linear PA, and its performance decides the maximum output power. At radio frequency and Ku-band, the linear PA can reach the required high power by using a power combiner to combine the output of each small-power amplifier module [26,27,28,29,30]. The ultrasound driver that sends square-wave signals uses eight [31] or fourteen [32] MOSFETs in parallel to increase the output power.…”

Section: Configuration Selectionmentioning

confidence: 99%

Broadband Linear High-Power Amplifier Based on the Parallel Amplification Architecture for Electromagnetic Ultrasonic Guided Wave

Zhou

Zheng

2019

Sensors

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The linear power amplifier with high-output power in the broadband frequency is the critical component required by exciting the electromagnetic acoustic transducer (EMAT) to generate ultrasonic guided wave (UGW). The methods to realize the output of a high-power signal in the linear amplification mode and to expand the bandwidth at high-output power are seldom reported. To solve these problems, a power amplifier with differential structure is developed by using the parallel amplification architecture and the broadband feedback circuits. The proposed power amplifier uses a differential structure to suppress the even harmonic waves and remove the disruptions. Each branch of the differential structure consists of five linear power amplifier modules with output terminals connected in parallel to increase the output power. Also, the negative voltage feedback is used to extend the bandwidth of the power amplifier. The experimental results show that the −3 dB bandwidth of the amplifier is from 40 kHz to 2.5 MHz, and the transient output power is greater than 1 kW. The power amplifier can drive the EMATs to generate ultrasonic guided waves. Because of the high-output power and good linearity, the proposed power amplifier has excellent potential for EMAT UGW applications.

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“…These solid-state device exhibits important advantages over vacuum tubes including higher reliability and longer life, small size and weight, lower cost and easier cooling. Generally, divide and combine topology [6][7][8][9] is used to develop a linear power amplifier delivering larger output power levels than that is achievable from single active devices. This topology has losses due to finite insertion loss, return loss and isolation of RF combiner.…”

Section: Introductionmentioning

confidence: 99%

Development of 5 kW, 1 MHz Solid State RF Pulsed Power Amplifier Using Parallel Configuration of Four LDMOS Transistor at Device and Operated in Single Ended Mode

Deo¹,

Jain²,

Lad³

2019

IJAMT

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A 5 kW and 1 MHz pulsed solid-state RF amplifier has been designed and developed to drive TH581 tetrode tube-based RF amplifier to realize 100 kW pulsed RF source. The driver amplifier is operated with a 1 ms pulse width at a 50 Hz repetition rate. The 5 kW RF power is obtained by operating four Gemini pair LDMOS transistors (VDD=50V) in parallel configuration at the device itself and having single-ended topology with common lumped element based input and output matching network. The amplifier delivers 5 kW RF power when fed by 25 dBm RF input drive from the signal generator. This scheme eliminates the need for RF combiner and divider which results in low loss, high efficiency, lesser number of components, simple and compact design. The measured saturated drain efficiency of the power amplifier is around 62%.

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Modular 20kW solid state RF amplifier for Indus-2 syncrotron radiation source

Cited by 15 publications

References 7 publications

Design and analysis of a high-power radial multi-way combiner

Design and analysis of a high-power radial multi-way combiner

Broadband Linear High-Power Amplifier Based on the Parallel Amplification Architecture for Electromagnetic Ultrasonic Guided Wave

Development of 5 kW, 1 MHz Solid State RF Pulsed Power Amplifier Using Parallel Configuration of Four LDMOS Transistor at Device and Operated in Single Ended Mode

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