Reply to Comments on “Wideband Radiation Reconfigurable Microstrip Patch Antenna Loaded With Two Inverted U-Slots”
Reply to Comments on “Wideband Radiation Reconfigurable Microstrip Patch Antenna Loaded With Two Inverted U-Slots”
复制标题
回复“装载两个倒U型槽的宽带辐射可重构微带贴片天线”的评论
DOI：
10.1109/tap.2019.2955215
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发表时间：
2020
影响因子：
5.7
通讯作者：
M. Pour
中科院分区：
文献类型：
--
作者：
Sai Radavaram;M. Pour
我们赞赏文献[1]中关于天线的主动散射参数和实现增益的评论。在这封信中，我们想通过略微修改[2]中的天线结构来解决在[2]中被简单地忽略的上述参数。合成的天线现在能够在45%的有源阻抗带宽上同时辐射宽边和锥形方向图，这仍然远远大于文献[3]-[13]中报道的具有可重构辐射方向图的微带贴片天线。对[2]的修改以改善两个端口之间的隔离，包括在贴片的中心加入H型短路，如图1(A)所示，并在天线上的适当位置放置短路通孔，该短路通孔从贴片的顶层延伸到地平面。这些通孔，加上贴片中心的狭缝，极大地减少了探头之间的相互耦合。H型短桩和其上的短路通孔有助于改善阻抗匹配。为了最大化两种工作模式，即和模式和差模式的总主动反射系数，用L形状的探头代替形状记忆合金探头来激励天线结构。为了集成L探头，天线的轮廓现在从$\sim 0.02\lambda_{\mathm{d}}$增加到$\sim 0.08\lambda_{\mathm{d}}$，其中$\lambda_{\mathm{d}}$是工作中心频率处的介电波长。
We appreciate the comments given in [1] on active scattering parameters and realized gain of the antenna in [2] . In this correspondence, we would like to address the aforementioned parameters, which were simply overlooked in [2] , by slightly modifying the antenna structure in [2] . The resultant antenna is now capable of radiating both the broadside and conical patterns over a 45% active impedance bandwidth, which is still much greater than that of the microstrip patch antennas with reconfigurable radiation patterns reported in [3] – [13] . The modifications to [2] to improve the isolation between the two ports include incorporating an H-shaped stub, inspired by the one in [14] , at the center of the patch, as shown in Fig. 1(a) , and placing shorting vias at appropriate positions on the antenna, which extends from the top layer of the patch to the ground plane. These vias, along with the narrow slits at the center of the patch, considerably aided in reducing the mutual coupling between the probes. The H-shaped stub and the shorting vias on it facilitated in improving the impedance matching. In the interest of maximizing the overall active reflection coefficients of both the modes of operation, i.e., SUM and DIFFERENCE modes, L-shaped probes are used to excite the antenna structure in lieu of the SMA probes. To integrate the L-probes, the profile of the antenna is now increased from $\sim 0.02\lambda _{\mathrm {d}}$ to $\sim 0.08\lambda _{\mathrm {d}}$ , where $\lambda _{\mathrm {d}}$ is the dielectric wavelength at the center frequency of operation.
影响因子：
5.7
作者：
Radavaram, Sai;Pour, Maria
通讯作者：
Pour, Maria