Balani Warsha, Sarvagya Mrinal, Samasgikar Ajit, Ali Tanweer, Kumar Pradeep
School of ECE, REVA University, Bangalore 560064, India.
MMRFIC Technology Private Limited, Bangalore 560016, India.
Sensors (Basel). 2021 Jan 12;21(2):477. doi: 10.3390/s21020477.
In this article, a compact concentric structured monopole patch antenna for super wideband (SWB) application is proposed and investigated. The essential characteristics of the designed antenna are: (i) to attain super-wide bandwidth characteristics, the proposed antenna is emerged from a traditional circular monopole antenna and has obtained an impedance bandwidth of 38.9:1 (ii) another important characteristic of the presented antenna is its larger bandwidth dimension ratio (BDR) value of 6596 that is accomplished by augmenting the electrical length of the patch. The electrical dimension of the proposed antenna is 0.18λ×0.16λ (λ corresponds to the lower end operating frequency). The designed antenna achieves a frequency range from 1.22 to 47.5 GHz with a fractional bandwidth of 190% and exhibiting S < -10 dB in simulation. For validating the simulated outcomes, the antenna model is fabricated and measured. Good conformity is established between measured and simulated results. Measured frequency ranges from 1.25 to 40 GHz with a fractional bandwidth of 188%, BDR of 6523 and S < -10 dB. Even though the presented antenna operates properly over the frequency range from 1.22 to 47.5 GHz, the results of the experiment are measured till 40 GHz because of the high-frequency constraint of the existing Vector Network Analyzer (VNA). The designed SWB antenna has the benefit of good gain, concise dimension, and wide bandwidth above the formerly reported antenna structures. Simulated gain varies from 0.5 to 10.3 dBi and measured gain varies from 0.2 to 9.7 dBi. Frequency domain, as well as time-domain characterization, has been realized to guide the relevance of the proposed antenna in SWB wireless applications. Furthermore, an equivalent circuit model of the proposed antenna is developed, and the response of the circuit is obtained. The presented antenna can be employed in L, S, C, X, Ka, K, Ku, and Q band wireless communication systems.
本文提出并研究了一种用于超宽带（SWB）应用的紧凑型同心结构单极贴片天线。所设计天线的基本特性如下：（i）为实现超宽带特性，该天线由传统圆形单极天线衍生而来，其阻抗带宽达到了38.9:1；（ii）所呈现天线的另一个重要特性是其较大的带宽尺寸比（BDR）值为6596，这是通过增加贴片的电长度实现的。所提天线的电尺寸为0.18λ×0.16λ（λ对应低端工作频率）。所设计的天线在仿真中实现了1.22至47.5 GHz的频率范围，分数带宽为190%，且S < -10 dB。为验证仿真结果，制作并测量了天线模型。测量结果与仿真结果吻合良好。测量频率范围为1.25至40 GHz，分数带宽为188%，BDR为6523，且S < -10 dB。尽管所呈现的天线在1.22至47.5 GHz的频率范围内能正常工作，但由于现有矢量网络分析仪（VNA）的高频限制，实验结果仅测量到40 GHz。所设计的超宽带天线具有增益良好、尺寸简洁以及带宽比先前报道的天线结构更宽的优点。仿真增益在0.5至10.3 dBi之间变化，测量增益在0.2至9.7 dBi之间变化。已实现频域以及时域特性分析，以指导所提天线在超宽带无线应用中的相关性。此外，还建立了所提天线的等效电路模型，并获得了电路的响应。所呈现的天线可应用于L、S、C、X、Ka、K、Ku和Q波段无线通信系统。
