scholarly journals An ultra‐wideband compact design for hyperthermia: Open ridged‐waveguide antenna

2022 ◽  
Author(s):  
Morteza Ghaderi Aram ◽  
Hadi Aliakbarian ◽  
Hana Dobšíček Trefná
Keyword(s):  
Ultra Wideband ◽  
Compact Design ◽  
Ridged Waveguide

scholarly journals Measurement and evaluation of radar cross section for furniture in an indoor propagation channel

2014 ◽  
Vol 12 ◽  
pp. 273-278 ◽  
Author(s):  
M. M. Maw ◽  
P. Supanakoon ◽  
S. Promwong ◽  
J. Takada
Keyword(s):  
Transfer Function ◽  
Cross Section ◽  
Indoor Environment ◽  
Radar Cross Section ◽  
Ultra Wideband ◽  
Indoor Propagation ◽  
Measurement And Evaluation ◽  
Propagation Prediction ◽  
Ridged Waveguide ◽  
Radar Equation

Abstract. This paper has attempted to evaluate the radar cross section (RCS) of two furniture items in an indoor environment in a frequency range of 3–7 GHz of the ultra-wideband (UWB) range. The RCS evaluation is achieved through an extended version of the radar equation that incorporates the channel transfer function of scattering. The time-gating method was applied to remove the multipath effect, a phenomenon which typically occurs in the indoor environment. Two double-ridged waveguide horn antennas for both vertical and horizontal polarizations were used to obtain the transfer function of scattering of the furniture prior to analysis in order to derive their bistatic RCS. The RCS results validate the applicability of the proposed extended radar equation to the indoor propagation prediction.

scholarly journals Highly Compact Design of Trimmed Patch with Modified Partial Ground Structure for Extreme-Wideband Systems

2017 ◽  
Vol 7 (5) ◽  
pp. 1918-1921
Author(s):  
H. Alsaif
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Substrate Material ◽  
Ultra Wideband ◽  
Operating Frequency ◽  
Radiation Characteristics ◽  
Total Size ◽  
Compact Design ◽  
Uwb Applications ◽  
Wide Operating

In this paper, a novel highly compact microstrip monopole antenna with adjusted ground plane for ultra-wideband (UWB) applications is proposed. The patch antenna is composed of a trimmed radiator and rectangular ground plane with four slots providing relatively extreme wide operating frequency from 2.8 till 16.2 GHz based on -10 dB criteria. The high matching impedance in the design results in ultra-wide bandwidth that covers the entire BW allocated by FCC for UWB applications. At the same time, the presented antenna is distinguished by significantly miniaturized structure with total size of 13 mm x 10 mm printed on a substrate material of Rogers Duriod RT 5880 LZ with relative permittivity of εr=1.9 and loss tangent δ of 0.0009. The suggested antenna is appropriate for miniature wireless gadgets. The patch has been investigated, and optimized in terms of operating frequency, impedance matching, radiation characteristics, structure size, and fabrication cost.

Compact Design of an UWB Antenna with Dual Band-Notched Characteristic

2012 ◽  
Vol 195-196 ◽  
pp. 13-16
Author(s):  
Wen Bo Zeng ◽  
Jia Zhao ◽  
Bao Zhong Ke ◽  
Qi Qi Wu
Keyword(s):  
Frequency Band ◽  
Printed Circuit Board ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Circuit Board ◽  
Dual Band ◽  
Uwb Antenna ◽  
Compact Design

An ultra-wideband (UWB) printed antenna with dual band-notched characteristic is presented in this paper. The proposed antenna is composed of a semi-circular patch fed by a tapered coplanar waveguide (CPW) and an unclosed ground plane, which are printed onto the same side of a FR4 printed circuit board (PCB) with an overall size of 30 mm × 30 mm × 1.5 mm. By embedding a simple arc-shaped slot in the patch and adding a T-shaped strip on the top of the patch, two notched frequency bands for rejection of WiMAX and WLAN system can be realized. The characteristics of the proposed antenna are investigated by using the software HFSS and validated experimentally, both simulated and measured results show that the proposed antenna prototype achieves good impedance matching over an frequency band from 2.1011.40 GHz for VSWR2 with two notched bands over the frequency range of 5-5.95 GHz and 3.1-3.9 GHz. Furthermore, a relatively stable gain and suitable radiation patterns are also achieved in both lower and upper UWB frequency band.

scholarly journals Simulation and manufacturing of modified circular monopole microstrip antenna for UWB applications

2021 ◽  
Vol 10 (1) ◽  
pp. 70
Author(s):  
Bilal S. Taha ◽  
Hamzah M. Marhoon
Keyword(s):  
Computer Simulation ◽  
Microstrip Antenna ◽  
High Speed ◽  
Reasonable Agreement ◽  
Ultra Wideband ◽  
Simulation Process ◽  
High Speed Data ◽  
Simulation Results ◽  
Compact Design ◽  
Uwb Applications

Ultra-wideband (UWB) technology is one of the most promising wireless communication solutions to be developed quickly because of the high-speed data, wide bandwidth and excellent immunity to multipath interference. In this work, the compact design of a modified circular monopole microstrip antenna is simulated and manufactured for the UWB applications. The simulation process of the proposed antenna was done based on the finite integration of the Computer Simulation Technology (CST) Microwave Studio (MWS). The proposed antenna comprises a copper radiating patch, Roger’s Kappa-438 substrate, and a single stub act as a reflector. The simulation results showed a reasonable agreement with the results of the measurement and good performance was achieved in the range from 1.8 to 10 GHz with VSWR less than 2.0.

scholarly journals Gain Enhancement of Double-Slot Vivaldi Antenna using Corrugated Edges and Semicircle Director for Microwave Imaging Application

2021 ◽  
Vol 21 (2) ◽  
pp. 85
Author(s):  
Findi Nur Witriani ◽  
Yahya Syukri Amrullah ◽  
Fajri Darwis ◽  
Taufiqqurrachman Taufiqqurrachman ◽  
Yusuf Nur Wijayanto ◽  
...  
Keyword(s):  
Medical Profession ◽  
High Gain ◽  
Microwave Imaging ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Gain Enhancement ◽  
Imaging Application ◽  
Vivaldi Antenna ◽  
Compact Design ◽  
Slot Structure

Microwave imaging, such as images for radiological inspection in the medical profession, is one of the applications utilized in ultra-wideband (UWB) frequency ranges. The Vivaldi antenna is one of the most popular antennas for this purpose. The antenna is utilized because of its simple, lightweight, and compact design, as well as its excellent efficiency and gain capabilities. In this work, we present a high-gain Vivaldi antenna for microwave imaging applications. The proposed Vivaldi antenna is designed using a double-slot structure method with the addition of corrugated edges and a semicircle director aimed at improving the gain. The antenna is designed to operate at frequencies ranging from 3.1 to 10.6 GHz. Based on the modeling findings, the suggested antenna attain a bandwidth of 7.5 GHz with operating frequencies from 3.1 GHz to 10.6 GHz for a VSWR of less than two. In comparison to a typical single slot antenna, the suggested antenna provides a substantial boost in gain performance. The increase in gain is proportional to the frequency of operation. The constructed antenna has a lower bandwidth than the simulated one, with operating frequencies of 3.5 GHz – 3.75 GHz and 4.25 – 10.89 GHz, respectively, and useable bandwidths of 250 MHz and 6.64 GHz. All these results suggest that the antenna is suitable for microwave imaging applications.

scholarly journals Bistatic configurational analysis of ultra-wideband antenna for detection applications

2019 ◽  
Vol 13 (2) ◽  
pp. 702
Author(s):  
Jawab Ali ◽  
Noorsaliza Abdullah ◽  
Roshayati Yahya ◽  
Ezri Mohd ◽  
Ariffuddin Joret ◽  
...  
Keyword(s):  
Human Skin ◽  
Ground Penetrating Radar ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Detection Model ◽  
Configurational Analysis ◽  
Compact Design ◽  
Ground Penetrating

<span>With the advancement in technology, antennae are becoming a popular components to be used in various applications. Following the trend, a compact design of ultra-wideband (UWB) bistatic configuration of the antenna is presented in this paper using ground penetrating radar (GPR) technology specifically for detection applications. The antenna is first designed and simulated using defected ground structure (DGS) for impedance bandwidth with the obtained gain of around 6.2 dB and return losses from 3-16 GHz. Later the complete detection model is aimed to study and for this purpose CST is used to model human skin and performed an experiment based on antennas i.e. transmitter and receiver, obstacle and target, to study and analyze the received antenna reflections for detection purpose.</span>

scholarly journals Measurement Engineering to Design a Truncated Ground Plane Compact Circular Ring Monopole Patch Antenna for Ultra Wideband Applications

2021 ◽  
Author(s):  
syed zeeshan Ali ◽  
Ikrame E Khuda ◽  
Kamran Raza ◽  
Mansoor Ebrahim
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Wide Band ◽  
Circular Ring ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Measurement Engineering ◽  
Compact Size ◽  
Compact Design

Abstract In this paper, using in-depth simulations and measurements, a simple and compact design is engineered for making a circular ring microstrip patch antenna radiating element which is suitable for different ultra wide band(UWB) applications. This design approach is different because it has not utilized the usual method of using a set of electromagnetic equations and calculations to make the radiating antenna. Measurements and simulations were performed on Microwave CST. Using this measurement engineering approach, novelty of proposed antenna structure is obtained by making the required changes in the ground plane. The measurements showed that truncating the ground plane by a square shape structure of 2.5mm by 2.5mm size at the feed point was practically significant to provide an impedance bandwidth (\({S}_{11}cript>\)) ranging from 2.75 GHz to 32.035 GHz with a VSWR which is less than 2. For this entire bandwidth the directivity has shown a variation from 0.8 dBi to 7.9 dBi. The compact size (33mm x28mm x1.57mm), low design complexity, very high bandwidth, good directivity and satisfying VSWR has made this antenna unique among all previously presented UWB antennas.

EBG Based Compact Design of Dual Band UWB MIMO Antenna Operating in Ku/K Band

2020 ◽  
Vol 10 (4) ◽  
pp. 268
Author(s):  
Subuh Pramono ◽  
Muhammad Hamka Ibrahim ◽  
Josaphat Tetuko Sri Sumantyo
Keyword(s):  
Dual Band ◽  
Mimo Antenna ◽  
Compact Design ◽  
K Band
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