scholarly journals A trade-off design of microstrip broadband power amplifier for UHF applications

2020 ◽  
Vol 10 (1) ◽  
pp. 919
Author(s):  
Mohamed Ribate ◽  
Rachid Mandry ◽  
Jamal Zbitou ◽  
Larbi El Abdellaoui ◽  
Ahmed Errkik ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Transmission Lines ◽  
Impedance Matching ◽  
Wave Impedance ◽  
Large Signal ◽  
Active Device ◽  
Quarter Wave ◽  
Lumped Elements ◽  
Signal Simulation ◽  
Matching Techniques

In this paper, the design of a Broadband Power Amplifier for UHF applications is presented. The proposed BPA is based on ATF13876 Agilent active device. The biasing and matching networks both are implemented by using microstrip transmission lines. The input and output matching circuits are designed by combining two broadband matching techniques: a binomial multi-section quarter wave impedance transformer and an approximate transformation of previously designed lumped elements. The proposed BPA shows excellent performances in terms of impedance matching, power gain and unconditionally stability over the operating bandwidth ranging from 1.2 GHz to 3.3 GHz. At 2.2 GHz, the large signal simulation shows a saturated output power of 18.875 dBm with an output 1-dB compression point of 6.5 dBm of input level and a maximum PAE of 36.26%.

scholarly journals Design of L-S band broadband power amplifier using microstip lines

2020 ◽  
Vol 10 (5) ◽  
pp. 5400
Author(s):  
Mohamed Ribate ◽  
Rachid Mandry ◽  
Jamal Zbitou ◽  
Larbi El Abdellaoui ◽  
Ahmed Errkik ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Transmission Lines ◽  
Power Level ◽  
Wave Impedance ◽  
Input Power ◽  
Active Device ◽  
Quarter Wave ◽  
Broadband Matching ◽  
Amplifier Design ◽  
Matching Techniques

This contribution introduces a novel broadband power amplifier design, operating in the frequency band ranging from 1.5 GHz to 3 GHz which cover the mainstream applications running in L and S bands. Both matching and biasing networks are synthesized by using microstrip transmission lines. In order to provide a wide bandwidth, two broadband matching techniques are deployed for this purpose, the first technique is an approximate transformation of a previously designed lumped elements matching networks into microstrip matching circuits, and the second technique is a binomial multi-sections quarter wave impedance transformer. The proposed work is based on ATF-13786 active device. The simulation results depict a maximum power gain of 16.40 dB with an excellent input and output matching across 1.5 GHz ~ 3 GHz. At 2.2 GHz, the introduced BPA achieves a saturated output power of 16.26 dBm with a PAE of 21.74%, and a 1-dB compression point of 4.5 dBm input power level. The whole circuitry is unconditionally stable over the overall bandwidth. By considering the broadband matching, the proposed design compares positively with the most recently published BPA.

scholarly journals 1.25 GHz – 3.3 GHz broadband solid state power amplifier for L and S bands applications

2019 ◽  
Vol 9 (5) ◽  
pp. 3633
Author(s):  
Mohamed Ribate ◽  
Rachid Mandry ◽  
Jamal Zbitou ◽  
Larbi El Abdellaoui ◽  
Ahmed Errkik ◽  
...  
Keyword(s):  
Solid State ◽  
Power Amplifier ◽  
Transmission Lines ◽  
Power Level ◽  
State Power ◽  
Wave Impedance ◽  
Input Power ◽  
Large Signal ◽  
Quarter Wave ◽  
Operating Bandwidth

The research of a single stage broadband solid-state power amplifier based on ATF13876 transistor, which operates in the frequency ranging from 1.25 GHz ~3.3 GHz is presented in this paper. To achieve the broadband performance of the operating bandwidth, a multi-section quarter wave impedance transformer and an approximate transformation of previously synthesized lumped elements into transmission lines are adopted. With neatly design of broadband matching networks and biasing circuit, excellent matching performances and unconditionally stability are achieved over the whole operating bandwidth with a maximum gain of 17.2 dB. The large signal simulation shows that the proposed circuit reaches a saturated output power of 18.12 dBm with a maximum PAE of 27.55% and a 1-dB compression point at 5 dBm input power level. Considering the wide frequency coverage, the features of the proposed design compares favorably with the contemporary state-of-the-art.

Comparison of Two Step and Six Step Impedance Matching Techniques using Quarter Wave Transformers

IJIREEICE ◽  
2017 ◽  
Vol 5 (2) ◽  
pp. 15-17
Author(s):  
Prof. Judhajit Sanyal ◽  
Prof. Sandip Bhattacharya ◽  
Mr. Prabal Chakraborty ◽  
Ms. Renaissa Das
Keyword(s):  
Impedance Matching ◽  
Quarter Wave ◽  
Matching Techniques

scholarly journals A Compact Output Power Combiner for Broadband Doherty Power Amplifiers

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 275 ◽  
Author(s):  
Ken McKnight ◽  
Ali Darwish ◽  
Mona Zaghloul
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Power Amplifiers ◽  
Peak Power ◽  
Wave Impedance ◽  
Size Reduction ◽  
Power Combiner ◽  
Quarter Wave ◽  
Saturated Output Power ◽  
Operating Bandwidth

A novel compact output power combiner for broadband Doherty Power Amplifiers is proposed in this paper. The proposed output power combiner avoids the use of quarter-wave impedance transformers as they are sizable and work over narrow bandwidths. Instead, the proposed combiner utilizes a distributed Brune Section to implement a compact broadband impedance inverter. The final area of the proposed output combiner is λ2/48. When compared to the conventional broadband Doherty structure, which has an approximate area of λ2/16, this structure offers an approximate size reduction of 67%. The proposed combiner is verified by using it in the design of a broadband Doherty power amplifier with an operating bandwidth of 1.7 GHz to 3.4 GHz. The saturated output power varies from 39.2 to 40.4 dBm with a peak power drain efficiency ranging from 58% to 66%. The drain efficiency at 6 dB Output Power Back-Off (OPBO) varies from 37.4% to 45% over an octave.

scholarly journals A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 169 ◽  
Author(s):  
Vivek T. Rathod
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Electrical Impedance ◽  
Impedance Matching ◽  
Careful Consideration ◽  
Piezoelectric Sensors ◽  
Electric Signal ◽  
Electric Impedance ◽  
The Common ◽  
Matching Techniques

Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.

An Acoustic Gray Scale for Scanning Acoustic Microscopy and Diagnostic Ultrasound

1979 ◽  
Vol 1 (1) ◽  
pp. 89-100 ◽  
Author(s):  
R. D. Weglein
Keyword(s):  
Impedance Matching ◽  
Diagnostic Ultrasound ◽  
Wave Impedance ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
Gray Scale ◽  
Acoustic Microscope ◽  
Quarter Wave ◽  
Scanning Acoustic Microscope ◽  
Single Material

The principle of a true acoustic gray scale standard is presented and experimentally applied to the Scanning Acoustic Microscope (SAM). The implementation is based on the impedance matching property of a quarter wave impedance transformer through which precise changes in reflection coefficient may be produced in a single material. The performance of the first implementation designed for 375 MHz operation is described and the implications of its use are discussed in detail. The application of the principle to diagnostic ultrasound is also treated.

scholarly journals Broadband power amplifier limitations due to package parasitics

2015 ◽  
Vol 12 (3) ◽  
pp. 275-291 ◽  
Author(s):  
Dusan Grujic ◽  
Lazar Saranovac
Keyword(s):  
Power Amplifier ◽  
Excellent Agreement ◽  
Design Flow ◽  
Large Signal ◽  
Third Order ◽  
Theoretical Predictions ◽  
Signal Simulation ◽  
Simulation Results ◽  
Amplifier Design ◽  
Chebyshev Filter

Limitations of CMOS broadband power amplifiers due to package parasitics have been explored in this paper. The constraints of power amplifier matching network, realized as a third-order Chebyshev filter, have been derived, and a new power amplifier design flow has been proposed. As an example of a proposed design flow, an UWB power amplifier has been designed. Transistor level large signal simulation results are in excellent agreement with theoretical predictions.

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