Resonance in Microstrip Ring Resonator with Uniaxially Anisotropic Substrate and Superstrate Layers

Abstract

Resonance in annular-ring microstrip resonator with uniaxially anisotropic substrate and superstrate layers is analysed in Hankel Transform domain using immitance approach. Resonant frequency shift due to uniaxial anisotropy is firstly investigated for different anisotropy ratio values of substrate and superstrate layers with respect to each other. The results obtained indicate that resonant frequency of anisotropic resonator has higher or lower values as compared to isotropic case according to the adjustment of the layer anisotropies. Then, the effect of inclusion of air gap layer inserted between substrate and ground plane on the resonance characteristics is also investigated for different superstrate anisotropies. The overall results provide helpful design criterias for the more efficient operation of microstrip ring for communications and integrated circuit applications.

Full-Wave Analysis of Anisotropic Circular Microstrip Antenna With Air Gap Layer

“…Figure 2 shows the resonant frequency against the air gap thickness for various radius of the circulardisk patch. It is seen that the operating frequency increases with the air layer thickness for a given value of patch size, however, it depends inversely on the patch size for a given air gap width d 1 .…”

“…Circular microstrip structure has been widely used in communication systems, wireless local area networks (WLANs) and some microwave applications radiator and resonators [1], due to their excellent advantages. Such advantages include small size, light weight, low production cost, conformal nature, and good aerodynamic characteristics [2].…”

“…Many techniques of bandwidth enhancement have been suggested and designed [4]. Bandwidth of microstrip antenna can be increased by designing the antenna with an air gap [1,4]. In order to obtain tunable characteristics, providing a wider bandwidth at the same time, a simple solution was proposed in the literature [5][6][7][8][9][10].…”

Specteral Domain Analysis of Resonant Characteristics and Radiation Patterns of a Circular Disk and Annular Ring Microstrip Antenna on Uniaxial Substrate

“…Furthermore, ring resonators have found applications in circulators, hybrid junction filters and other microwave devices [19]. Several articles on ring patches on uniaxial substrates has been recently published [20][21][22].…”

Subwavelength Array of Planar Triangle Monopoles With Cross Slots Based on Far-Field Time Reversal

“…Antenna system has wide applications in mobile electronics such as wireless mobile communication, radio frequency identification (RFID), and wireless sensor network [1][2][3][4][5][6][7][8][9][10][11][12][13]. These systems, aiming to achieve multiple-antenna design with multiple independent channels on sizelimited platforms, always seek means to greatly improve the capacity and data-rate of communication.…”