Power amplifier design for UHF band
Study, design, and fabrication of power amplifier module to be used for low-attitude radar system operating at UHF band (820MHz-900MHz)
Long Hoang Duc*
Duong Bach Gia
University of Engineering and Technology, Hanoi VNU
144th Xuan Thuy road, Cau Giay Dist
Hanoi, Vietnam
(*) Corresponding author
Email: longhd@vnu.edu.vn
University of Engineering and Technology, Hanoi VNU
144th Xuan Thuy, Cau Giay Dist
Hanoi, Vietnam
Email: duongbg@vnu.edu.vn
Abstract—In this paper, we introduces the configuration of a high-power solid- state transmitter to be used for modern radar system operating at UHF band (820Mhz – 900Mhz). Specially, the power amplifier module (150W output power) does play a critically important role in such a system being consisting of twostage 90W-and-200W amplifier that allows the output to reach up to 1.2kW per block, and even approximate 9.6 kW to whole system using the classical power combination method. Our work mainly targets to present the study, design, and fabrication of both 150-Watt basic module and high-power Wilkinson method, which are the key components in the topology. The design and simulated results were carried out by the microwave engineering professional design software, known as ADS2008 package. The achieved results meet the demand of modern radar transmitter.
All simulations and experimental results will be reported.
Keywords: Solid- state transmitter, power amplifier module,
Wilkinson.
I.
I
INTRODUCTION
N the semiconductor age, the state-of-the-art MESFET,
LDMOS, MOSFET, and so on could make it possible to increase the performance of the power amplifier modules, which could be available up to hundreds of Watts, covering from few Hz to dozens of GHz. This is the reason why almost all modern radar systems tend to use the advanced technology devices instead of vacuum tube such as the cavity magnetron, the klystron, etc [1]. To modern radar system, especially lowattitude surveillance
Long Hoang Duc*
Duong Bach Gia
University of Engineering and Technology, Hanoi VNU
144th Xuan Thuy road, Cau Giay Dist
Hanoi, Vietnam
(*) Corresponding author
Email: longhd@vnu.edu.vn
University of Engineering and Technology, Hanoi VNU
144th Xuan Thuy, Cau Giay Dist
Hanoi, Vietnam
Email: duongbg@vnu.edu.vn
Abstract—In this paper, we introduces the configuration of a high-power solid- state transmitter to be used for modern radar system operating at UHF band (820Mhz – 900Mhz). Specially, the power amplifier module (150W output power) does play a critically important role in such a system being consisting of twostage 90W-and-200W amplifier that allows the output to reach up to 1.2kW per block, and even approximate 9.6 kW to whole system using the classical power combination method. Our work mainly targets to present the study, design, and fabrication of both 150-Watt basic module and high-power Wilkinson method, which are the key components in the topology. The design and simulated results were carried out by the microwave engineering professional design software, known as ADS2008 package. The achieved results meet the demand of modern radar transmitter.
All simulations and experimental results will be reported.
Keywords: Solid- state transmitter, power amplifier module,
Wilkinson.
I.
I
INTRODUCTION
N the semiconductor age, the state-of-the-art MESFET,
LDMOS, MOSFET, and so on could make it possible to increase the performance of the power amplifier modules, which could be available up to hundreds of Watts, covering from few Hz to dozens of GHz. This is the reason why almost all modern radar systems tend to use the advanced technology devices instead of vacuum tube such as the cavity magnetron, the klystron, etc [1]. To modern radar system, especially lowattitude surveillance
References: David M. Pozar, Microwave Engineering 2nd Edition, John Wiley & Sons, inc, New york, United State of America, 1998. Merrill I. Skolnik, “Radar handbook”, 1990, chap 10. Andrei Grebennikov, “Power combiners,impedance transformers and directional couplers: Part II”, 2008.