In this paper, the design and the analysis of miniaturized implantable conformal patch antennas are proposed for biomedical applications. A polyimide substrate material is considered to achieve conformability. The radiating element is a monopole rectangular patch antenna with three split ring resonators (SRR), and a rectangular slot with CPW (coplanar waveguide) feeding is presented. The proposed implantable conformal CPW-fed patch (ICCP) antenna resonates at free space at 2.41 GHz (2.01-2.82 GHz) frequency with an impedance bandwidth of 810 MHz and the gain of 2.62 dB are observed. The in vitro test is considered in muscle mimicking phantom gel with proposed ICCP antenna, and it resonates at 2.60 GHz (2.41-2.81 GHz) with an impedance bandwidth of 400 MHz and the gain of −19.6 dB are observed. The ICCP antenna is also considered in different layers of the human tissue simulation model, and the antenna works at ISM band. The specific absorption rate (SAR) is obtained for all proposed cases, and these are all within the limits of the federal communication commission (FCC). The ICCP antenna is manufactured and tested for free space and a muscle mimicking phantom gels. Good agreement results have observed between simulated and measured values.INDEX TERMS Conformal antenna, SRR, CPW-fed, implanted devices, in-vitro, polyimide, SAR.
A simple low profile defected ground structure based monopole circular-shaped patch antenna is proposing for ultrawide-band applications. The design allows for a simple and compact structure on the FR-4 substrate material. The proposed design initially has a meager antenna gain and bandwidth. To increase the antenna bandwidth and gain, the defective ground structure is implemented with four dumble-shaped slots. Parametric analysis is considered to find the radius of circular patch for tuning of UWB frequency applications. The proposed MCP antenna resonates at 2.9 GHz, 9.1 GHz frequencies with a S11 of − 34.84 dB, − 33.74 dB, respectively, and achieves 8.1 GHz (2.5–10.6 GHz) impedance bandwidth concerning the − 10 dB reference line of the reflection coefficient. The gains are 8.4 dBi, 8.2 dBi for the two resonant frequencies, and the radiation patterns are semi-omnidirectional, omnidirectional. The proposed antenna has-been validated by observing good agreement between the simulation and the measured results.
In this article, the intensive investigations are carried out on a low volume compact flexible antenna for wireless applications with a novel structure model. The proposed model has considered as an elliptical‐ring with split‐triangular patch (ERSTP) antenna with the coplanar waveguide feeding to achieve dual‐bands. The ERSTP antenna is designed with polyimide material having the volume (L a × W a × h) 99 mm3. The ERSTP antenna resonates with 2.60 GHz and 3.48 GHz frequencies with a reflection coefficient of −21.92 dB and −32.14 dB and a gain of 2.39 dBi and 1.75, dBi respectively. The impedance bandwidths are 100 MHz and 330 MHz observed at two frequency bands. The proposed ERSTP antenna has operated on mobile‐worldwide interoperability for microwave access (M‐WiMAX) and worldwide interoperability for microwave access (WiMAX) bands respectively. The simulated and measured results of ERSTP antenna are in good agreement.
In this article, investigation has been carried out on Y‐shaped patch antenna to produce triple‐band for wireless applications. The corrugated Y‐shaped patch antenna is considered to produce low reflection coefficient with high gain at the triple‐bands. The corrugated Y‐shaped patch antenna is resonates at 4.19 GHz (4‐4.43 GHz), 8.79 GHz (8.61‐9.01 GHz), 13 GHz (12.6‐13.6 GHz) frequencies with reflection coefficient of −29.26 dB, −34.87 dB, −40.37 dB and gain 5.01 dBi, 5.42 dBi, 7.46 dBi, respectively. The proposed corrugated Y‐shaped patch antenna works three frequency bands at radio communications, satellite communications, and aeronautical radio navigation applications, respectively.
In this paper the analysis and investigations are carried out on portable antennas for worldwide interoperability for microwave access (WiMAX) applications of flexible coplanar waveguide (CPW)-feed split-triangular shaped patch (STSP). The proposed STSP antenna is fabricated from polyimide substrate material having the dimension of 18×20×0.1 mm 3 (volume is 36 mm 3). It resonates at 3.55 GHz frequency of a reflection coefficient (S 11) of −24.45 dB and offers impedance bandwidth of 580 MHz (3.3-3.88 GHz) with a gain of 2.06 dBi. The STSP antenna has small size, light weight, low volume, and is flexible for WiMAX applications. Simulation and measured results of the proposed STSP antenna are in close agreement.
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