Improved Characteristics of Antipodal Vivaldi Antenna for UWBRADAR Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 287-294
Author(s):  
Djalal Ziani Kerarti ◽  
Fatima Zahra Marouf
Keyword(s):  
Return Loss ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Simple Design ◽  
Compact Dimension ◽  
Radar Applications ◽  
Flat Gain ◽  
Vivaldi Antenna ◽  
Wideband Radar ◽  
Improved Characteristics

Background & Objective: In this paper, a simple design of antipodal Vivaldi antenna for ultra-wideband Radar applications is presented. Methods: The antenna provided to operate across the entire UWB spectrum sins it covers a very wide frequency band from 2.43 up to 13 GHz with better return loss characteristics. In addition, the antenna offers high and flat gain in this band. The numerical designs of the antennas have been performed by using the commercially available software CST MW, which it’s printed on Taconic substrate with a dielectric constant of 4.5 and thickness 1.6 mm. Results and Conclusion: The antenna has a compact dimension of 40 × 50 mm2 achieve satisfactory impedance matching and radiation efficiency.

scholarly journals Design of Ultra Wideband Antenna

2020 ◽  
Vol 8 (5) ◽  
pp. 3988-3990
Keyword(s):  
Return Loss ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Rectangular Patch ◽  
Microstrip Feed

In this paper, A coplanar waveguide (CPW) ultra-wideband(UWB) antenna is designed, analyzed and simulated by computer simulation technology(CST). The proposed antenna is fabricated on FR-4 dielectric substrate. A microstrip feed line is used to excite the antenna.The ground plane is slotted to improve the impedance bandwidth (BW). Here, a rectangular patch is used as radiator and two corners out of four are truncated to improve impedance matching and UWB characterization.This antenna satisfies UWB characteristics like VSWR<2, Return loss(S11)<-10 dB,Gain<5dB and the antenna is operating within the frequency range of 1.59 to 11.87 GHz range which covers whole ultra wideband i.e. 3.1 to 10.6 GHz range.

Multiband rectangular-shaped ring antenna embedded with inverted S- and C-shaped strips for WLAN/WiMAX/UWB applications

2014 ◽  
Vol 7 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Davinder Parkash ◽  
Rajesh Khanna
Keyword(s):  
Return Loss ◽  
Impedance Matching ◽  
Research Work ◽  
Fair Agreement ◽  
Ultra Wideband ◽  
Low Profile ◽  
Radiating Element ◽  
Ring Antenna ◽  
Parametric Studies ◽  
Uwb Applications

This research work presents a microstrip-fed antenna that is small, low-profile, planar, and suitable for WLAN/WiMAX and partially ultra-wideband (UWB) applications. The radiating element of the proposed antenna consists of rectangular-shaped ring embedded with a three inverted “S”-shaped and inverted “C”-shaped strips. This antenna is capable of generating penta bands having good impedance matching with wideband characteristics. Prototype of the proposed antenna has been designed, simulated, fabricated, and tested. The overall small size of the antenna is 24.75 mm × 27.39 mm × 1.6 mm with volumetric size of 1 cm3. To understand the characteristics of the proposed antenna, the parametric studies are being performed. The return loss of the proposed antenna shows fair agreement with the simulated and measured results.

scholarly journals Compact Dual-Polarized Vivaldi Antenna with High Gain and High Polarization Purity for GPR Applications

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 503
Author(s):  
Hai-Han Sun ◽  
Yee Hui Lee ◽  
Wenhao Luo ◽  
Lai Fern Ow ◽  
Mohamed Lokman Mohd Yusof ◽  
...  
Keyword(s):  
Impedance Matching ◽  
High Gain ◽  
Ultra Wideband ◽  
Compact Antenna ◽  
Oblique Position ◽  
Vivaldi Antenna ◽  
Dual Polarized ◽  
Ground Penetrating ◽  
Low Dispersion ◽  
Polarized Radiation

A compact ultra-wideband dual-polarized Vivaldi antenna is proposed for full polarimetric ground-penetrating radar (GPR) applications. A shared-aperture configuration comprising four Vivaldi elements for orthogonal polarizations is designed to reduce the low-end operating frequency and improve the port isolation with a compact antenna size. The directivity of the antenna is enhanced by the oblique position of the radiators and the implementation of a square loop reflector. Experimental results demonstrate that the antenna has very good impedance matching, port isolation, and dual-polarized radiation performance, with low dispersion characteristics across band of interest from 0.4 GHz to 3.0 GHz. GPR measurements with the designed antenna show that the antenna maintains good detection capability even for objects buried in a highly conductive soil.

scholarly journals Modified Ultra Wideband (UWB) Antipodal Vivaldi Antenna for 5

2018 ◽  
Vol 8 (5) ◽  
pp. 3067
Author(s):  
Subuh Pramono ◽  
Budi Basuki S. ◽  
Tommi Hariyadi
Keyword(s):  
Return Loss ◽  
Ultra Wideband ◽  
Angular Width ◽  
Impedance Bandwidth ◽  
Fractional Bandwidth ◽  
Edge Structure ◽  
Vivaldi Antenna ◽  
Tan Δ

<p>This paper presents a half triangular Comb-shaped slits edge Antipodal Vivaldi Antenna (Comb-AVA) as compared to the conventional Antipodal Vivaldi Antenna (AVA) design. This proposed antenna covers 20-40 GHz spectrum. This Comb-AVA antenna is designed for the 5G application which is addressed to cover a dualband 28/38 GHz frequencies. A half triangular comb-shaped slits edge structure is employed to investigate its effects on antenna parameters. This proposed Comb-AVA occupies a 25x8 mm2 of FR 4 substrate (𝜀𝛾 = 4.4, tan δ=0.02, thinkness 1.6 mm). It has impedance bandwidth (S11≤-10 dB) along 20-40 GHz spectrum and fractional bandwidth (FBW) ≥0.5. It means that the bandwidth is categorized as ultra wideband (UWB). In addition, there is 11 dB refinement of return loss in the CombAVA design at 38 GHz frequency. VSWR value is in range of 1.054 to 1.396. This proposed antena also has a wider angular width (3 dB) than the AVA. Higher directivity and gain is generated by Comb-AVA at 28 GHz. This proposed antenna has good performances and suitable for 5G application. </p>

scholarly journals Analytical Performance of Low Noise Amplifier Using Single-Stage Configuration for ADS-B Receiver

2021 ◽  
Vol 21 (2) ◽  
pp. 91
Author(s):  
M. Reza Hidayat ◽  
Ilham Pazaesa ◽  
Salita Ulitia Prini
Keyword(s):  
Return Loss ◽  
Noise Figure ◽  
Impedance Matching ◽  
High Gain ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Stability Factor ◽  
Ic 10 ◽  
Radar Applications ◽  
Noise Amplifier

Automatic dependent surveillance-broadcast (ADS-B) is an equipment of a radar system to reach difficult areas. For radar applications, an ADS-B requires a low noise amplifier (LNA) with high gain, stability, and a low noise figure. In this research, to produce an LNA with good performance, an LNA was designed using a BJT transistor 2SC5006 with DC bias, VCE = 3 V, and current Ic = 10 mA, also a DC supply with VCC = 12 V, to achieve a high gain with a low noise figure. The initial LNA impedance circuit was simulated using 2 elements and then converted into 3 elements to obtain parameters according to the target specification through the tuning process, impedance matching circuit was used to reduce return loss and voltage standing wave ratio (VSWR) values. The LNA sequence obtains the working frequency of 1090 MHz, return loss of -52.103 dB, a gain of 10.382, VSWR of 1.005, a noise figure of 0.552, stability factor of 0.997, and bandwidth of 83 MHz. From the simulation results, the LNA has been successfully designed according to the ADS-B receiver specifications.

scholarly journals Design an Ultra- Wideband Modified Wilkinson Power Divider Fed-by Balanced Antipodal Vivaldi Antenna Array for Imaging Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 4236-4241
Keyword(s):  
Low Cost ◽  
Impedance Matching ◽  
Simulation Software ◽  
Ultra Wideband ◽  
Power Divider ◽  
Power Splitting ◽  
Frequency Range ◽  
Radial Stub ◽  
Vivaldi Antenna ◽  
Wilkinson Power Divider

In this paper, design of compactand modified geometrical structure of 1-to-4 way ultra-wideband Wilkinson power divider used as a feeding network for 4-element of balanced antipodal Vivaldi antenna (BAVA) array has introduced. The proposed Wilkinson power divider has been designed and printed on low-cost Epoxy laminate substrate FR4 along with the thickness of 1.6mm and relative permittivity of ɛr =4.3 respectively. The transformation of power divider network which are based on bent corners as a replacement of sharp corners or edges used for the decrement in unintended radiation and employing a single radial stub on each branch to encounter the antenna-specifications. Further some adjustments in the dimension of stubs matching in order to increase the reflection of the power divider network. The design presents the model of a power divider and maintains an equal power splitting at different ports with practical insertion loss and conventional return loss below -10dB. The reasonable impedance matching has achieved at every single port with acceptable isolation performance values over the (3-to-10 GHz) frequency range. The divider as well as antenna elements design and its optimization are practicable via computer simulation technology (CST) simulation software. The experimental results are revealed to encounter the arrayspecifications under ultra-wideband frequency range..

scholarly journals Design and analysis of dual band integrated hexagonal shaped microstrip UWB antenna

2019 ◽  
Vol 15 (1) ◽  
pp. 294 ◽  
Author(s):  
Alaa Farhood ◽  
Maham Kamil Naji ◽  
Suhad Hasan Rhaif Hasan Rhaif ◽  
Adnan Ali
Keyword(s):  
Return Loss ◽  
Hexagonal Structure ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Dual Band ◽  
Uwb Antenna ◽  
Left Edge ◽  
Hexagonal Shape ◽  
Radar Applications ◽  
Uwb Applications

<span class="s22">In this paper, we proposed a hexagonal shaped </span><span class="s22">microstrip</span><span class="s22"> ultra-wideband (UWB) antenna integrated with dual band applications. The antenna design consists of a hexagonal shape patch with two folded Capacitive Loaded Line Resonators (CLLRs) on the left edge of the patch antenna. This hexagonal structure is used to implement UWB applications (3.1-10.6 GHz). A rectangular ground</span><span class="s22">,</span><span class="s22"> and two CLLR are also used on t</span><span class="s22">he bottom of antenna to obtain</span><span class="s22"> the extra dual resonant frequency at 2.4 GHz and 9.1 GHz for </span><span class="s22">B</span><span class="s22">luetooth and radar applications respectively. The proposed design is implemented using FR4 epoxy substrate. The relative permittivity of the substrate is 4</span><span class="s22">.4. The overall size of designing</span><span class="s22"> antenna is 26 × 30 mm2 with 1.6 mm as thickness and fed by standard feed line of 50 Ω </span><span class="s22">microstrip</span><span class="s22">. The results obtained from the simulation indicate that the designed antenna attains a good bandwidth from 1.1 GHz – 10.69 GHz with VSWR &lt; 2 and return loss &lt; -10 </span><span class="s22">dB.</span><span class="s22"> The proposed geometry is s</span><span class="s22">imulated  by using the </span><span class="s22">Ansoft</span><span class="s22"> HFSS </span><span class="s22">simulator working on the principle of FEM and results are also analyzed.</span>

scholarly journals Antipodal Vivaldi Antenna for Water Pipe Sensor and Telemetry

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Giuseppe Ruvio ◽  
Domenico Gaetano ◽  
Max J. Ammann ◽  
Patrick McEvoy
Keyword(s):  
Remote Monitoring ◽  
Figure Of Merit ◽  
Dynamic Range ◽  
Impedance Matching ◽  
Water Levels ◽  
Radiation Efficiency ◽  
Ultra Wideband ◽  
Water Pipe ◽  
Antenna Impedance ◽  
Vivaldi Antenna

An antipodal Vivaldi antenna operates simultaneously for telemetry and sensing when placed conformally onto PVC pipes. Good radiation efficiency is realised and the antenna impedance matching remains stable when a pipe is empty or contains water. The fidelity factor performance based on an input Ultra-Wideband Gaussian pulse is a suitable figure of merit to detect water presence. Different water levels and pipe conditions correspond to fidelity factors between 90% and 96%, which are a suitable dynamic range for sensing and the appropriate quality for pulse communications for remote monitoring.

scholarly journals Compact Ultra-Wideband Phase Inverter Using Microstrip-CPW-Slotline Transitions

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 252
Author(s):  
Wahab Mohyuddin ◽  
Gwan Hui Lee ◽  
Dong Sik Woo ◽  
Hyun Chul Choi ◽  
Kang Wook Kim
Keyword(s):  
Return Loss ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Frequency Bandwidth ◽  
Microwave Frequencies ◽  
Phase Inverter ◽  
Field Transformation ◽  
Phase Deviation ◽  
Better Than

A planar ultra-wideband phase inverter, which consists of a series of transitions between microstrip, coplanar waveguide, and slotline, is designed and implemented. This compact-sized phase inverter can be used to generate wideband 180° phase differential signals, especially at high microwave frequencies up to millimeter-waves. The design is based on the impedance matching and smooth field transformation between the transitional stages. The fabricated transition has dimensions of 7.36 mm × 5.08 mm, and provides ultra-wide frequency bandwidth from 13 GHz to 38 GHz with low insertion loss of better than 2 dB within ±5° phase deviation and with return loss of greater than 10 dB.

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