scholarly journals High-resolution probe design for measuring the dielectric properties of human tissues

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Xinran Wang ◽  
Hongfu Guo ◽  
Chen Zhou ◽  
Junkai Bai
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Near Field ◽  
Probe Design ◽  
Good Resolution ◽  
Human Tissues ◽  
High Frequency Structure Simulator ◽  
Measurement Resolution ◽  
Small Loop ◽  
The Relationship

Abstract Background In order to use the microwave to measure the dielectric constant of the human body and improve the measurement resolution, a small near-field probe working at 915 MHz is designed in this paper. Method Based on the electric small loop antenna model loaded by the spiral resonator (SR), a small near-field probe was designed. The probe model is designed and optimized by the HFSS (high frequency structure simulator) software. The human tissues were tested by the manufactured probe and the relationship between the S11 parameters of the probe and the human tissues was analyzed. Results and conclusions A probe with small size was designed and fabricated, with the overall size of 10.0 mm × 12.0 mm × 0.8 mm. The probe has a good performance with a 30.7 dB return loss, a 20 MHz bandwidth at the resonance point, and a distance resolution of 10 mm. Due to the small size and good resolution of the probe, it can be used in the measurement of human tissues.

Comb Shaped Triple Band Microstrip Antenna for Wireless Communication

2021 ◽  
Vol 9 (4) ◽  
pp. 379-382
Keyword(s):  
Dielectric Constant ◽  
Wireless Communication ◽  
High Frequency ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Experimental Results ◽  
High Frequency Structure Simulator ◽  
Frequency Structure ◽  
Triple Band

A comb shaped microstrip antenna is designed by loading rectangular slots on the patch of the antenna. The antenna resonating at three different frequencies f1 = 5.35 GHz, f2 = 6.19 GHz and f3= 8.15 GHz. The designed antenna is simulated on High Frequency Structure Simulator software [HFSS] and the antenna is fabricated using substrate glass epoxy with dielectric constant 4.4 having dimension of 8x4x0.16 cms. The antenna shows good return loss, bandwidth and VSWR. Experimental results are observed using Vector Analyzer MS2037C/2.

Optimum Patch Dimension Ratio of T-Shaped Microstrip Antenna

2013 ◽  
Vol 684 ◽  
pp. 303-306
Author(s):  
Eugene Rhee ◽  
Ji Hoon Lee
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Return Loss ◽  
Impedance Matching ◽  
Feeding Method ◽  
High Frequency Structure Simulator ◽  
Feeding Methods ◽  
Coaxial Probe ◽  
Dimension Ratio

There are various feeding methods of antenna like as coaxial probe, coupling, parasitic elements, and impedance matching. This paper adopted the microstrip line method as the feeding method of the antenna. The high frequency structure simulator is used to analyze the characteristics of the T-shaped microstrip antenna with various patch dimensions. In comparison with the basic microstrip antenna, this proposed T-shaped microstrip antenna with 40.38 % of patch dimensions has the optimum characteristics of resonant frequency, return loss, and radiation pattern at 2.0 GHz band.

scholarly journals Design of Wideband Antenna Array for WiMax Application

2021 ◽  
Vol 9 (8) ◽  
pp. 958-962
Author(s):  
Rakesh N
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
High Frequency ◽  
Return Loss ◽  
Flow Solver ◽  
Wideband Antenna ◽  
Circular Patch ◽  
High Frequency Structure Simulator ◽  
Frequency Structure ◽  
Circular Patch Antenna

Abstract: The evolution of wireless communication system has led path for innovative antenna design specifically in wideband antenna for WiMax application. In this paper design and simulation of microstrip wideband circular patch antenna array operating between 2GHz to 4Ghz is presented. The circular patch antenna is designed to operate at 3GHz line feed and the ground is itched to achieve required wideband characteristics. The simulation is carried out in EM Flow solver, High Frequency Structure Simulator software. For a single patch antenna, the return loss, lesser than -10dB throughout the bandwidth. Later an antenna array is operating between 2GHz to 4GHz frequency is designed and simulated. The return loss is lesser than -12dBi throughout the band and a peak gain is 14.7dBi. Keywords: Microstrip Patch Antenna (MPA), High Frequency Structure Simulator (HFSS).

scholarly journals Low Profile Wideband Dual-Ring Slot Antenna for Biomedical Applications

2021 ◽  
Vol 19 ◽  
pp. 38-44
Author(s):  
Shilpee Patil ◽  
Vinod Kapse ◽  
Shruti Sharma ◽  
Anil Kumar Pandey
Keyword(s):  
High Frequency ◽  
Biomedical Applications ◽  
Return Loss ◽  
Impedance Matching ◽  
Slot Antenna ◽  
Great Flexibility ◽  
High Frequency Structure Simulator ◽  
Large Bandwidth ◽  
Low Profile ◽  
Dual Ring

In this study, a low-profile, co-planar waveguide (CPW) fed, wideband, and dual-ring slot antenna design for biomedical applications is proposed. The proposed antenna has a total area of 10 mm × 10 mm and a height of 0.4 mm, and is designed by using a thin and biocompatible FR4 epoxy (εr = 4.4) substrate to accomplish human body isolation and great flexibility obtained by implantation. This wideband antenna covers a large bandwidth of industrial scientific and medical (ISM) frequency band, including 902.8 MHz to 928 MHz, 1.395 GHz to 1.4 GHz, 1.427 GHz to 1.432 GHz, 2.4 GHz to 2.485 GHz, and above. The simulation results of return loss, voltage standing wave ratio (VSWR), impedance matching, gain, and radiation pattern of the proposed antenna are obtained through High Frequency Structure Simulator (HFSS) 14 software.

scholarly journals A Square Patch with L and Inverted L shaped slotted AMC structure for Wi-Fi Applications

2020 ◽  
Vol 9 (1) ◽  
pp. 1722-1725
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
High Frequency ◽  
Return Loss ◽  
Band Width ◽  
Magnetic Conductor ◽  
Radiation Characteristics ◽  
Artificial Magnetic Conductor ◽  
High Frequency Structure Simulator ◽  
Phase Reflection

To improve the antenna characteristics in terms of bandwidth, gain and its radiation characteristics without providing any phase reflections, Artificial Magnetic Conductor (AMC) are used in antenna designing. This paper initially designed AMC structure for 2.4GHz frequency. The proposed AMC structure consists of three L shaped and inverted L shaped slots and provides zero degrees phase reflection at 2.4GHz resonant frequency. This proposed AMC structure is incorporated on conventional micro strip square patch antenna and results are simulated in High Frequency Structure Simulator (HFSS) software. The Proposed AMC incorporated patch antenna, return loss is improved from -16.16dB to -31.75dB, VSWR is from 1.42 to 1.05, the band width is increased from 16.5 MHz to 348.1 MHz This design resonates at a frequency of 2.4GHz and applicable to Wi-Fi applications.

scholarly journals Low Cost Antenna Design for the Application of Over the Horizon Surface Wave Radar

2019 ◽  
Vol 9 (2) ◽  
pp. 2215-2218
Keyword(s):  
Surface Wave ◽  
High Frequency ◽  
Return Loss ◽  
Linear Array ◽  
Low Cost ◽  
Antenna Design ◽  
High Frequency Structure Simulator ◽  
Water Region ◽  
Wave Radar ◽  
Communication Devices

The need for surveillance and security in Indonesian water region which can monitor activities of distance object such as illegal fishing, foreign vessels violation, piracy of vessels and smuggling can be done by using radio wave. Maritime radar over the horizon (OTH) surface wave is able to detect the existence of foreign vessels in Indonesian waters. Based on this, the study aimed to design a low cost antenna namely Yagi - Uda linear array antenna at 15 MHz frequency at frequency range 6 – 24 MHz for the application of over the horizon radar. Yagi - Uda antenna is superior in the spread of wave suitable to OTH Radar characteristic over the sea surface and big gain. Yagi - Uda antenna develops rapidly in communication system makes it applied in many modern communication devices nowadays. This antenna was designed and simulated using Simulator Ansoft High Frequency Structure Simulator (HFSS) version 13. The simulation result of the antenna design after doing optimization was return loss (S11) = -29,62 dB, VSWR = 1.068 and gain = 2,413 dBm.

scholarly journals Effects of the Feedline Position on Microstrip Patch Antenna Performance

2021 ◽  
Vol 06 (12) ◽  
Author(s):  
Ali Recai Celik ◽  
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Line Position ◽  
High Frequency Structure Simulator ◽  
Feed Line ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Antenna Performance ◽  
Basic Characteristics

Abstract In this study, it is aimed to demonstrate the effects of the feed line position on the operating frequency, return loss and bandwidth of the rectangular patch microstrip antenna. For this purpose, a compact-sized antenna that can operate at 2.4-2.45 GHz frequencies is designed in High Frequency Structure Simulator (HFSS) program. Then, the position of the feedline is changed horizontally and vertically, and its effects are observed. The results obtained after the modificaions are given and discussed. It is stated that the feed line position is a very important parameter that affects the basic characteristics of the antenna.

scholarly journals Logarithmic Slots Antennas Using Substrate Integrated Waveguide

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Jahnavi Kachhia ◽  
Amit Patel ◽  
Alpesh Vala ◽  
Romil Patel ◽  
Keyur Mahant
Keyword(s):  
Dielectric Constant ◽  
High Frequency ◽  
Return Loss ◽  
High Gain ◽  
Substrate Integrated Waveguide ◽  
High Frequency Structure Simulator ◽  
High Gain Antenna ◽  
X Band ◽  
New Generation ◽  
Better Than

This paper represents new generation of slotted antennas for satellite application where the loss can be compensated in terms of power or gain of antenna. First option is very crucial because it totally depends on size of satellite so we have proposed the high gain antenna creating number of rectangular, trapezoidal, and I shape slots in logarithm size in Substrate Integrated Waveguide (SIW) structure. The structure consists of an array of various shape slots antenna designed to operate in C and X band applications. The basic structures have been designed over a RT duroid substrate with dielectric constant of 2.2 and with a thickness of 0.508 mm. Multiple slots array and shape of slot effects have been studied and analyzed using HFSS (High Frequency Structure Simulator). The designs have been supported with its return loss, gain plot, VSWR, and radiation pattern characteristics to validate multiband operation. All the proposed antennas give gain more than 9 dB and return loss better than −10 dB. However, the proposed structures have been very sensitive to their physical dimensions.

scholarly journals DESIGN AND ANALYSIS OF MODIFIED CIRCULAR FRACTAL ANTENNA FOR S, C AND X-BAND APPLICATIONS

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
Taniya .
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Satellite Communication ◽  
Network Analyzer ◽  
Fractal Antenna ◽  
Construction Costs ◽  
High Frequency Structure Simulator ◽  
Telecommunication Satellite ◽  
X Band ◽  
Radar Applications

In this paper, presenting the design and analysis of Modified Circular Fractal Antenna (MCFA) for S, C and X- band applications. Used the defined range of Sband is 2GHz-4GHz, C-band is 4GHz-8GHz and X-band is 8GHz-12GHz. S-band communication antennas have application in weather, tracking, and microwave oven. Cband antennas are useful in telecommunication, satellite communication and X-band is useful in radar applications. The proposed antenna has been implanted on FR4-epoxy substrate with the dielectric constant of 4.4 and height of 1.6 mm. Circular fractal antenna exhibits all required parameters that depends on the sizq and feed line position of the circular patch. The antenna has also been fabricated with optimized dimensions and then tested. The proposed antenna is fed by a microstrip line feed. The proposed antenna has been designed and simulated by HFSS vs 13.0 (High Frequency Structure Simulator). The various antenna parameters such as return loss, VSWR, gain and radiation pattern has been calculated. This proposed antenna operates at five different frequencies 2.87GHz, 6.39GHz, 6.89GHz, 8.00GHz and 8.51 GHz. The vector Network Analyzer (VNA) of proposed antenna is used for the measurement of return loss, VSWR. The simulated and measured results are compared and are found to be a good relative values with each other. Small in size, reduction in construction costs are the advantages of proposed antenna.

scholarly journals Design of Meta Material Inspired Series and Corporate Feed Network Antenna

2020 ◽  
Vol 9 (4) ◽  
pp. 3061-3064
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Low Cost ◽  
Software Tool ◽  
Substrate Material ◽  
Optimization Techniques ◽  
Array Antenna ◽  
High Frequency Structure Simulator ◽  
Compact Size ◽  
Feed Network

The present techniques are in the form of open literature used to work on selected frequency that has eight and sixteen rectangular patches. The size of it has become compact. Each approach offers different advantages, depending on the required applications. An array antenna is designed and analyzed using series and corporate feed network The FR4 substrate material which is of low cost and easily available in market is used to design the array antenna. An analysis is carried out for both series and corporate feed array antenna in terms of return loss, peak gain, VSWR, directivity, and bandwidth. The antenna’s size is reduced to a very compact size using optimization techniques without degrading the performance characteristics. The design is implemented to work for the multiband applications rather than a single application. Simulation is carried out in HFSS (High Frequency Structure Simulator) software tool. The design proposed is analyzed based on the performance and then it is fabricated.

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