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首页> 外文期刊>Antennas and Propagation, IEEE Transactions on >A Reconfigurable PIFA Using a Switchable PIN-Diode and a Fine-Tuning Varactor for USPCS/WCDMA/m-WiMAX/WLAN
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A Reconfigurable PIFA Using a Switchable PIN-Diode and a Fine-Tuning Varactor for USPCS/WCDMA/m-WiMAX/WLAN

机译：用于USPCS / WCDMA / m-WiMAX / WLAN的使用可切换PIN二极管和微调变容二极管的可重构PIFA

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摘要

A reconfigurable planar inverted-F antenna using a switchable PIN-diode and a fine-tuning varactor is presented for mobile communication applications. Selection of operating modes is achieved by switching the PIN-diode between radiators and tuning the varactor on an antenna's shorting line. Mode I, with the PIN-diode off and tuning the varactor, operates for USPCS (1.85–1.99 GHz), WCDMA (1.92–2.18 GHz), and WLAN (5.15–5.825 GHz). As a result, the varactor used to achieve frequency fine-tuning does not need a DC bias circuit and can expand the bandwidth without increasing the physical size. Mode II, with the PIN diode on and the fixed 0-V varactor, operates for USPCS and m-WiMAX (3.4–3.6 GHz). To optimize the antenna structure, a parametric analysis is performed by sweeping the length and width of the radiators. Furthermore, equivalent models of a PIN diode and a varactor are presented for accurate prediction of antenna performances which are also analyzed by varying diode parameters. All simulated results are confirmed with measured data. The peak gains show 2.84, 2.81, 1.25, and 1.49 dBi at USPCS, WCDMA, m-WiMAX, and WLAN, respectively.
机译：针对移动通信应用，提出了一种使用可切换PIN二极管和微调变容二极管的可重构平面倒F天线。通过在辐射器之间切换PIN二极管并调整天线短路线上的变容二极管，可以选择工作模式。在PIN二极管关闭并调节变容二极管的情况下，模式I适用于USPCS（1.85-1.99 GHz），WCDMA（1.92-2.18 GHz）和WLAN（5.15-5.825 GHz）。结果，用于实现频率微调的变容二极管不需要直流偏置电路，并且可以在不增加物理尺寸的情况下扩展带宽。模式II的PIN二极管导通且固定有0V变容​​二极管，适用于USPCS和m-WiMAX（3.4–3.6 GHz）。为了优化天线结构，通过扫描辐射器的长度和宽度来进行参数分析。此外，给出了PIN二极管和变容二极管的等效模型，用于精确预测天线性能，这些模型也通过改变二极管参数进行分析。所有模拟结果均由测量数据确认。在USPCS，WCDMA，m-WiMAX和WLAN处，峰值增益分别显示2.84、2.81、1.25和1.49 dBi。

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