[Show abstract][Hide abstract]ABSTRACT: This paper presents a simple theory model of high impedance surface, and uses the model to explain the phenomena that resonant frequency of high impedance surface rise as transverse area ratio of metal pole and cell becomes larger. Finally, on the base of this model, paper presents a method to extend the bandwidth of high impedance surface restraining surface waves.
[Show abstract][Hide abstract]ABSTRACT: In this paper, the Poynting analysis of electromagnetic (EM) energy leakage of substrate integrated wave-guide (SIW) due to periodic gaps is investigated for the first time. By EM simulation, Poynting flowing through the sidewalls is extracted to describe the EM energy leakage characteristics of the SIW. With this method, not only SIW, but also other multi-layer microwave integrated circuits with EM energy leakage can be studied.
[Show abstract][Hide abstract]ABSTRACT: A 35GHz elliptic function four poles bandpass filter that is compatible with multi-layer substrate integrated wave-guide (MSIW) technique based on low temperature co-fired ceramics (LTCC) is presented. The filter consists of four MSIW cavities in a multi-layer design, with evanescent-mode coupling between adjacent cavities and a cross coupling between the first and last cavities, and are fed by micro-strip lines through slot apertures. The simulated filter response has a bandwidth of 1.6% centered at 35 GHz with an insertion loss of 1dB, and two poles at 34.39 GHz and 35.73 GHz, respectively.