寬頻槽式耦合微帶天線

Abstract

本論文提出兩種結構來增加傳統槽式耦合天線的頻寬:第一種是在槽式耦 合天線上加上共平面金屬平板;第二是採用串聯饋入的結構。我們使用全 波頻域積分方程式以及動差法來分析這兩種結構。此外,我們使用新的數 值方法來增加計算的速度,並且以實驗結果驗證理論的正確性。我們也討 論各元件參數對輸入阻抗的影響以達到設計寬頻槽式耦合天線的目的。 This thesis presents two approaches to increase the antenna's bandwidth of conventional aperture coupled microstrip antenna structure. One is coplanar patches with one aperture coupled to microstrip line, the other is series-fed patches with apertures coupled to microstrip line. Both configurations are analyzed using an integral equation technique solved in spectral domain with the Galerkin method of moments. New numerically efficient methods are applied to expediate the calculations. Experimental data are shown to be in be good agreement with the calculated results. The effect of varying geometric parameters of the structure is discussed with a goal of designing wide-band microstrip antenna.