應用微帶耦合天線之主動天線放大陣列設計

Abstract

本論文提出一應用微帶耦合天線之主動天線放大陣列設計，在陣列中的每一個天線單元間的連結是經由放置在天線旁的耦合傳輸線所構成。此陣列中每個微帶天線所需要的激發功率可藉由調整耦合能量及放大器增益的大小來達成。為了能夠精確控制耦合量的大小，關於耦合線之線長長短、間距寬窄以及耦合埠的方向對耦合量所造成的效應會被探討到。實測顯示出天線及陣列均有不錯的結果。本論文所提出的放大陣列跟傳統的架構比較有下列優點:不需要功率分配器、較高的傳送增益、良好及可控制的輻射場型、偏壓電路設計容易和較不耗費電路基板面積。

This paper presents the design of an active antenna amplifying array using patch-coupling microstrip antennas. In the array each element was linked by the coupled transmission lines placed next to the patch. The required power in the excitations of the individual patches of the array was achieved by adjusting the levels of coupling energy and amplifier gain. To control the levels of coupling energy precisely, the effects of different coupled-line’s lengths, gaps, and the port orientations are investigated. Experiments show good results of the antennas and the arrays. The proposed amplifying array has the following advantages over the conventional ones: a single input port, no power divider required, higher transmission gain, good and controllable radiation patterns, ease of bias, and compactness.