scholarly journals Improved adaptive impedance matching for RF front-end systems of wireless transceivers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Pancham Shukla ◽  
Chan H. See ◽  
Raed A. Abd-Alhameed ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Wireless Transceivers ◽  
Front End ◽  
Rf Front End

scholarly journals Optimum power transfer in RF front end systems using adaptive impedance matching technique

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Leyre Azpilicueta ◽  
Chan H. See ◽  
Raed Abd-Alhameed ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Adaptive Antenna ◽  
Power Transfer ◽  
Control Loops ◽  
Matching Networks ◽  
Front End ◽  
Rf Front End ◽  
Matching Technique ◽  
Digital Circuitry ◽  
Communications System

AbstractMatching the antenna’s impedance to the RF-front-end of a wireless communications system is challenging as the impedance varies with its surround environment. Autonomously matching the antenna to the RF-front-end is therefore essential to optimize power transfer and thereby maintain the antenna’s radiation efficiency. This paper presents a theoretical technique for automatically tuning an LC impedance matching network that compensates antenna mismatch presented to the RF-front-end. The proposed technique converges to a matching point without the need of complex mathematical modelling of the system comprising of non-linear control elements. Digital circuitry is used to implement the required matching circuit. Reliable convergence is achieved within the tuning range of the LC-network using control-loops that can independently control the LC impedance. An algorithm based on the proposed technique was used to verify its effectiveness with various antenna loads. Mismatch error of the technique is less than 0.2%. The technique enables speedy convergence (< 5 µs) and is highly accurate for autonomous adaptive antenna matching networks.

Tunable impedance matching network with wide impedance coverage for multi frequency standards RF front-end

2017 ◽  
Vol 82 ◽  
pp. 74-82 ◽  
Author(s):  
Yan Chiew Wong ◽  
Ranjit Singh Sarban Singh ◽  
Syafeeza Binti Ahmad Radzi ◽  
Norihan Binti Abdul Hamid
Keyword(s):  
Impedance Matching ◽  
Matching Network ◽  
Frequency Standards ◽  
Front End ◽  
Rf Front End ◽  
Tunable Impedance

scholarly journals Signal Conditioning Stage in S-Band Communication Subsystem for CubeSat Applications

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1627
Author(s):  
Joel A. Castillo ◽  
Jorge Flores-Troncoso ◽  
Rigoberto Jáuregui ◽  
Jorge Simón ◽  
José L. Alvarez-Flores
Keyword(s):  
High Frequency ◽  
Impedance Matching ◽  
Space Mission ◽  
Proof Of Concept ◽  
Signal Conditioning ◽  
Scattering Parameters ◽  
Front End ◽  
Rf Front End ◽  
Concept Space

This work presents the design, performance evaluation, manufacture, and characterization of an RF front-end signal conditioning chain on a substrate that achieves the best performance at S-band frequencies and complies with the dimensions of the international standard for CubeSat-type nanosatellites. In this development, the signal conditioning chains were carried out on the high-frequency substrates RO4350B, CuClad 250, and RT/duroid 5880, considering scattering parameters in a small-signal regime. Concerning the power output, after the filtering and amplifying stages, the conditioning chain delivered 2 watts at 2.25 GHz. Moreover, up to 40 dB gain was achieved, and a good impedance matching at −20 dB for both input and output ports was observed. The numerical simulations and experimental results showed that an RO4350B substrate allows the smallest design dimensions, and these comply with the dimensions of the CubeSat standard. The manufactured RF front-end signal conditioning chain on RO4350B requires an area of 95 mm2, and it is ready to be used in a proof-of-concept space mission in a CubeSat.

Sign in / Sign up

Export Citation Format

Share Document