T. L. Lau

Bio: T. L. Lau is an academic researcher from Universiti Malaysia Perlis. The author has contributed to research in topics: Particle swarm optimization & Insertion loss. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

An optimization of 15.12 GHz SPDT switch using particle swarm optimization algorithm

Abstract: In this paper, a simulation-based particle swarm optimization (PSO) approach is developed to optimize the operational parameters of a 15.12 GHz single pole double throw (SPDT) switch. The Agilent Advance Design System (ADS) is used to synthesize the performance of the switch design while PSO is employed as the optimizer for achieving the required switch performance. The performance of the designed SPDT switch is assessed in terms of insertion loss and isolation. Simulation results show that the proposed component values of SPDT switch is manage to fulfill the required specifications, achieving 25.978dB of isolation loss and 3.077dB of insertion loss.

Selectable Multiband Isolation Of Single Pole Double Throw Switch Using Transmission Line Stub Resonator For Wimax And Lte Applications

Abstract: This paper presents a selectable multiband isolation of Single Pole Double Throw (SPDT) switch with switchable transmission line stub resonators for applications of WiMAX and LTE in 2.3 and 3.5 GHz bands. Two SPDT switches are presented. (Design 2) either allows selecting only one band while unselecting the other or selecting both of them. However, (Design 1) does not allow so. The transmission line stub resonator used in this design is an open stub resonator with quarter wave of the electrical length. By using a simple mathematical model, the theory of the transmission line stub resonator was discussed where it can be cascaded and resonated at center frequencies of 2.3 and 3.5 GHz. Moreover, the cascaded transmission line stub resonators can be reconfigured between all-pass and band-stop responses using discrete PIN diodes. The key advantage of the proposed SPDT with switchable transmission line stub resonators is a multiband high isolation with a minimum number of PIN diodes. Therefore, the simulated and measured results showed the followings: less than 3 dB of insertion loss, greater than 10 dB of return loss and higher than 30 dB of multiband isolation in 2.3 and 3.5 GHz bands.