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Two novel wide-angle and broadband 2D photonic crystal polarization splitters (PCPS) which are the multilayer wavy films (MWF) structure and arrow-head like structure are designed based on the autocloning method. Plane wave expansion (PWE) method is used to calculate the band structure and explain the reason for the wide-angle and broadband polarization splitting effect. In order to verify the result derived from PWE method, finite-difference time-domain (FDTD) method is employed to test and measure the polarization effect for the MWF structure. [ABSTRACT FROM AUTHOR]

In this paper, a band-stop radiation filter based upon a planar photonic crystal single-defect micro-cavity is studied. The micro-cavity is located within a photonic crystal region and fed by a ridge waveguide. Because the micro-cavity structure is bounded on one side by a limited number of crystal rows, there is strong radiation, at resonance, into the surrounding 2D slab (i.e., the region that is free from the photonic crystal). The antenna radiation pattern of this micro-cavity can be substantially directional and is strongly dependent upon the cavity resonant wavelength, giving the possibility for this device to act as a directional radiation filter. The theoretical analysis of this device is performed by using 2D Finite-Difference Time-Domain (FDTD) methods, while the device is fabricated in an InP epi-layered structure. Initial characterization results are also presented for this single-defect radiation filter. [ABSTRACT FROM AUTHOR]

A simplified and very effective equivalent network model of a one dimensional Photonic Band Gap (ID-PBG) microstrip line for the harmonic tuning of Active Integrated Antenna (AIA) amplifiers is proposed in this paper. A parametric analysis of the transmission line reflection and transmission features is also presented showing the dependence of the stopband characteristics on the main geometrical parameters. Finally, the main effects of the proposed PBG filter in an AIA amplifier design are pointed out including harmonic tuning and output power increase. [ABSTRACT FROM AUTHOR]