Determining Bandwidth Estimators and Matching Circuits for Evaluation of Chassis Antennas
Determining Bandwidth Estimators and Matching Circuits for Evaluation of Chassis Antennas
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DOI：
10.1109/tap.2015.2443862
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发表时间：
2015-06
影响因子：
5.7
通讯作者：
R. Valkonen;A. Lehtovuori
中科院分区：
文献类型：
--
作者：
R. Valkonen;A. Lehtovuori
本文提出了一个程序，用于确定一个强频率依赖性的负载阻抗时，使用一个简单的匹配电路的实际可实现的带宽。主要的目标应用是移动的手机天线，其可能固有地是非谐振的，并且因此从输入阻抗不知道可实现的带宽。提出了一种简单有效的确定各种带宽估计量的算法。一个紧凑的双频WLAN天线，然后设计，制造和测量作为一个例子，利用带宽估计的应用。另一个例子演示了带宽估计器如何用于确定对称双元件天线的匹配和去耦电路。结果表明，带宽估计器可以作为天线设计的辅助工具，将部分设计挑战从电磁学转移到电路设计。
This paper presents a procedure for determining the practically achievable bandwidth of a strongly frequency-dependent load impedance when using a simple matching circuit. The main target application is mobile handset antennas, which might be inherently nonresonant and thus the achievable bandwidth is not known from the input impedance. A straightforward and efficient algorithm for determining various bandwidth estimators is presented. A compact dual-band WLAN antenna is then designed, manufactured, and measured as an example application of utilizing the bandwidth estimators. Another example demonstrates how the bandwidth estimators can be used to determine a matching and decoupling circuit for a symmetrical dual-element antenna. The results show that the bandwidth estimators can be used as a supplementary tool in antenna design, transferring a part of the design challenge from electromagnetics to circuit design.