Antenna Patch Design Using a Photonic Crystal Substrate at a Frequency of 1.6 THz
In this paper, the design of a macro strip patch antenna with a photonic crystal structure has been studied. The purpose of this study is to create a photonic band gap (PBG) structure that can be used to design macro strip antennas. With this method, we can increase the bandwidth several times and increase the antenna’s gain. The noise and radiation loss of the antenna will also be significantly reduced by the use of PGB technology. The bandwidth of the antenna is 0.6 GHz to 1.6 THz. At 1.4 THz, the gain is 7.703 dB. This antenna is widely used in high frequency microwave transmitter and microwave receiver systems.
This work presents three improved plasma display panel (PDP) sustainers for reducing current stress and nonlinear effect due to parasitic and distributed components. In the paper, a useful cell equivalent circuit model is first introduced to describe the behavior of PDP cell operation, and a widely used sustainer is then reviewed, on which three improved ones are proposed. The proposed sustainers can reduce currents through the switches and nonlinear effect due to parasitic and distributed components along the energy-recovery circuit paths. Derivation and operating principle of the proposed sustainers are addressed in detail. In addition, their related gaseous discharge mechanism in PDP cells is also presented. Hardware measurements have verified the feasibility of the proposed sustainers.