Low-phase error and high isolation CMOS active balun

Background: Switches are important component in electrical system. The switches needs to have the advantages of low ON-state resistance, very high OFF-state resistance, high isolation, no leakage current, less power loss, fast switching, high linearity, small size, arcless and low cost in bulk production. Also these switches have to be reliable and environmental friendly. Methods: In this paper, macro and microswitches for power applications are extensively reviewed and summarized. Various types of switches such as mechanical, solid-state, hybrid and micromechanical switches have been used for power applications are reviewed. The importance and challenge in achieving arcless switching is presented. Results: The use of micromechanical switches for power applications, actuation techniques, switching modes, reliability and lifetime are also reviewed. The modeling and design challenges are also reviewed. Conclusion: The applications of micromechanical switches shows that the switches can reduce the leakage current in battery operated systems and reduce the size of the system considerably.

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A UHF Compact Complex Impedance-transforming Balun with High Isolation

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096513666200212103557 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1135-1144

Author(s):

Kittipong Nithiporndecha ◽

Chatrpol Pakasiri

Keyword(s):

Complex Impedance ◽

Output Port ◽

Reflection Coefficients ◽

Coupled Line ◽

High Isolation ◽

Line Structure ◽

Source Impedance ◽

Phase Balance ◽

High Output

Background: A compact complex impedance-transforming balun for UHF frequencies, which is based on a coupled-line structure that matched all ports and provided high output port isolation, was designed in this paper. Methods: A lumped component transformation was used to minimize circuit size. The implemented circuit operated at 433 MHz with the reflection coefficients less than -16 dB at all ports, 0.22 dB amplitude balance and 180° phase balance at the output ports. The signal coupling between the output ports was -16.8 dB. The circuit size is small at 0.032λ. Results: Complex impedance-transforming baluns were designed to operate at 433 MHz. The source impedance at port 1 was set at Zs = 12 - j12Ω and the load impedances at port 2 and 3 were set at ZL = 80 + j30Ω. Conclusion: A compact complex impedance-transforming balun at UHF frequency, with all ports matched and high isolations, was designed and illustrated in this paper.

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РАЗРАБОТКА СВЧ МОНОЛИТНЫХ ИНТЕГРАЛЬНЫХ СХЕМ МИЛЛИМЕТРОВОГО ДИАПАЗОНА НА ОСНОВЕ GAAS ДЛЯ ПРИМЕНЕНИЯ В СОВРЕМЕННЫХ ИНФОРМАЦИОННОКОММУНИКАЦИОННЫХ СИСТЕМАХ НОВОГО ПОКОЛЕНИЯ (5G)

Nanoindustry Russia ◽

10.22184/1993-8578.2020.13.3s.321.324 ◽

2020 ◽

Vol 96 (3s) ◽

pp. 321-324

Author(s):

Е.В. Ерофеев ◽

Д.А. Шишкин ◽

В.В. Курикалов ◽

А.В. Когай ◽

И.В. Федин

Keyword(s):

Output Power ◽

Power Amplifier ◽

Integrated Circuit ◽

Phase Shifter ◽

Phase Error ◽

Microwave Integrated Circuit ◽

Gain Compression ◽

Monolithic Microwave Integrated Circuit ◽

And Performance ◽

Power Capability

В данной работе представлены результаты разработки СВЧ монолитной интегральной схемы шестиразрядного фазовращателя и усилителя мощности диапазона частот 26-30 ГГц. СКО ошибки по фазе и амплитуде фазовращателя составили 1,2 град. и 0,13 дБ соответственно. Максимальная выходная мощность и КПД по добавленной мощности усилителя в точке сжатия Ку на 1 дБ составили 30 дБм и 20 % соответственно. This paper describes the design, layout, and performance of 6-bit phase shifter and power amplifier monolithic microwave integrated circuit (MMIC), 26-30 GHz band. Phase shifter MMIC has RMS phase error of 1.2 deg. And RMD amplitude error is 0.13 dB. MMIC power amplifier has output power capability of 30 dBm at 1 dB gain compression (P-1dB) and PAE of 20 %.

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