4.7 Article

Direct Synthesis and Design of Wideband Linear-to-Circular Polarizers on 3-D Frequency Selective Structures

期刊

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 10, 页码 9385-9395

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3177491

关键词

Circular polarization; frequency selective structures (FSSs); slotline; synthesis method; wideband

资金

  1. National Key Research and Development Program of China [2021YFE0205900]
  2. National Natural Science Foundation of China [62071243, 61971475]
  3. Macao Science and Technology Development Fund under The Science and Technology Development Fund of Macao (FDCT) [0085/2020/AMJ, 0095/2019/A2]

向作者/读者索取更多资源

“A novel direct synthesis method for wideband linear-to-circular polarizers on 3-D frequency selective structures is proposed. The synthesis method utilizes two orthogonal linearly polarized transmission paths to achieve circularly polarized transmission, and introduces new conditions of phase difference and phase slope to replace the typical phase condition. The proposed method is validated through theoretical investigations and fabrication of a design example, showing wide axial ratio bandwidth and low insertion loss. This synthesis method provides a promising solution for designing other types of wideband linear-to-circular polarizers.”
A novel direct synthesis method for widehand linear-to-circular polarizers on 3-D frequency selective structures is presented. The proposed linear-to-circular polarizer consists of two orthogonal linearly polarized (LP) transmission paths, both of which are comprised by three cascaded sections of slotline structures. Under the incidence of an LP wave with its electric-field (E-field) vector of a titled angle 45 degrees, each path can achieve a transmission passband for one of the two orthogonal components decomposed by the incident E-field vector. To obtain a transmitted wave with circularly polarized (CP) property, the well-known conditions on magnitude and phase difference of these two paths are presented. Then, to develop a unified synthesis method, two new conditions of phase difference and phase slope at the center frequency are introduced to replace the typical phase condition. The closed-form equations are derived, and a synthesis procedure is given. It can be obtained that all the involved circuit parameters can be derived from the specifications of these two paths, such as in-band insertion loss (IL) ripples and fractional bandwidths. Moreover, the phase difference condition of these two paths is further modified to obtain an arbitrary axial ratio (AR) at the center frequency and enhance the AR bandwidth of the polarizer. A group of design examples are theoretically investigated to demonstrate and verify the design concept. An alternative design example is finally selected and fabricated. Good agreement between simulated and measured results features its advantages of wide AR bandwidth and low IL. Therefore, the proposed synthesis method can provide a promising solution to design many other types of widehand linear-to-circular polarizers.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据