Triple-Band Concurrent Reconfigurable Matching Network

Abstract

Reconfigurable Matching Networks (RMN) have found a wide range of applications, such as antenna impedance matching (Antenna Tuning Units -ATU-), the design of reconfigurable power amplifiers, applications in Magnetic Resonance Imaging (MRI), adjustable low noise amplifier design, etc. In this paper, we propose the experimental design and verification of a reconfigurable impedance synthesis network that can simultaneously work in three different bands and is completely independent so that the impedance variations in a frequency band are approximately transparent to the rest. The variable elements used in this paper are varactors. To verify its operation, it is applied to a process of matching a laser modulator in three different frequency bands for C-RAN (Cloud Radio Access Networks) applications. Experimental results demonstrate, as expected, that losses may depend on the state in which they are driven. Consequently, a state that can guarantee a good match could also imply greater losses, leading to a certain trade-off. The application of genetic algorithms in this context points out that it may be convenient to optimize the insertion losses of the complete chain instead of the return losses.INDEX TERMS Multiband Reconfigurable Matching Network (RMN), reconfigurable devices, load-pull.

A Class-F Based Power Amplifier with Optimized Efficiency in Triple-Band

“…Additionally, the second and the third harmonic load terminations also need to be considered to improve the efficiency by various approaches. However, most of the designs failed to solve the challenge and to realize the optimization in operating multi-bands, e.g., the methods proposed in [11][12][13][14] are focusing on the broadband performance, rather than the bands of interest in our application [15][16][17][18][19][20].…”