ANALYSIS OF TAPERED FINLINE IN POWER COMBINER FOR WIDEBAND APPLICATION

2016 ◽  
Vol 78 (6-7) ◽  
Author(s):  
Nur Shaheera Alia Sadick ◽  
Ali Mohamad Zoinol Abidin Abd Aziz ◽  
Badrul Hisham Ahmad ◽  
Mohd Azlishah Othman ◽  
Hamzah Asyrani Sulaiman
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Power Combiner ◽  
Simulation Process ◽  
Design Structure ◽  
Vivaldi Antenna ◽  
Cst Microwave Studio

Tapered finline or slotline array has used in Vivaldi antenna design to produce Ultra-wideband (UWB). This paper focuses to design and analysis the structural of tapered finline in order to achieved wideband in rectangular waveguide power combiner at frequency 0.5 GHz to 6 GHz. There are three main parameters are studying in this paper which are of length of radiation region exponential coefficient at curves of radiation and exponential coefficient at curves of directivity. The design of tapered finline in power combiner is simulated using CST Microwave Studio Software. The simulation process is based on the input return loss at port 1 (S11), input return loss at port 2 (S22), isolation (S21) and insertion loss (S12). By studying the effect of the parameter on the design structure, it can be ensure that the tapered finline structures are suitable in wideband design.

scholarly journals A Simplified Design Inline Microstrip-to-Waveguide Transition

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 215 ◽  
Author(s):  
José Pérez-Escudero ◽  
Alicia Torres-García ◽  
Ramón Gonzalo ◽  
Iñigo Ederra
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Intermediate Step ◽  
Analytical Design ◽  
Waveguide Transition ◽  
W Band

A simplified design of an inline transition between microstrip and rectangular waveguide is presented in this paper. The transition makes use of a dielectric filled rectangular waveguide (DFRW) as an intermediate step, which simplifies manufacturing and allows for an analytical design. The behavior of the transition has been experimentally validated in the W-band by means of a back-to-back configuration. Good performance has been achieved: a return loss greaterthan 10 dB and mean insertion loss lower than 1 dB.

A wideband right-angle transition between thin substrate integrated waveguide and rectangular waveguide based on multi-section structure

2015 ◽  
Vol 8 (2) ◽  
pp. 185-191 ◽  
Author(s):  
Teng Li ◽  
Wenbin Dou
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Impedance Matching ◽  
Experimental Results ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Rectangular Aperture ◽  
Section Structure ◽  
Better Than

In this paper, a novel wideband right-angle transition between thin substrate integrated waveguide (SIW) and rectangular waveguide (RWG) based on multi-section structure operating at center frequency 31.5 GHz is presented. A multi-section SIW with a rectangular aperture etched on the broad wall and two stepped ridges embedded in the RWG flange are introduced to obtain a wide impedance matching. The simulations show that the bandwidth with return loss better than 20 dB is about 17 GHz. In order to verify our designs, two back-to-back transitions with different lengths are fabricated and measured. The experimental results agree well with simulations. The proposed component shows an insertion loss less than 0.44 dB and a return loss better than 14.5 dB over 12.15 GH, which corresponds to 38.57% bandwidth.

scholarly journals Design & Performance of Wearable Ultra Wide Band Textile Antenna for Medical Applications

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Nikhil Singh ◽  
Ashutosh Kumar Singh ◽  
Vinod Kumar Singh
Keyword(s):  
Return Loss ◽  
Wide Band ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Future Research ◽  
Medical Monitoring ◽  
Hospital Emergency ◽  
Textile Antenna ◽  
Wearable Products ◽  
Work Done

AbstractThe concept of wearable products such as textile antenna are being developed which are capable of monitoring, alerting and demanding attention whenever hospital emergency is needed, hence minimizing labour and resource. In the proposed work by using textile material as a substrate the ultra wideband antenna is designed especially for medical applications.Simulated and measured results here shows that the proposed antenna design meets the requirements of wide working bandwidth and provides 13.08 GHz bandwidth with very small size, washable (if using conductive thread for conductive parts) and flexible materials. Results in terms of bandwidth, radiation pattern, return loss as well as gain and efficiency are presented to validate the usefulness of the current proposed design. The work done here has many implications for future research and it could help patients with such flexible and comfortable medical monitoring techniques.

Broadband Transition between Rectangular Waveguide and Substrate Integrated Waveguide Based on Double Rhombus Antenna Probe

2014 ◽  
Vol 668-669 ◽  
pp. 799-802
Author(s):  
Hai Yan Jin ◽  
Teng Yue
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Substrate Integrated Waveguide ◽  
Metal Waveguide ◽  
Low Insertion Loss ◽  
Better Than ◽  
Good Agreement

The paper presents a design of rectangular waveguide-SIW transition, which provides a broadband and low insertion loss performance. The broadband transition is realized by using double-rhombus antenna probe inserted into rectangular metal waveguide. The transition is simulated and measured at 9-20GHz. The measured results show that a good agreement with simulation and an insertion loss less than 2.8 dB and a return loss better than 10 dB are obtained at 10–18.5 GHz for a back-to-back structure.

scholarly journals Design and Simulation of Spoon Shaped Antenna using DGS

2019 ◽  
Vol 9 (2) ◽  
pp. 2257-2259
Keyword(s):  
Return Loss ◽  
Antenna Design ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Comparison Results ◽  
Wireless Application ◽  
Cst Microwave Studio

A planer spoon shaped antenna with defected ground structure (DGS) is designed and fabricated for wireless application. The proposed antenna design exhibits 1.6GHz bandwidth, 2.20dBi Avg. Gain and maximum return loss of -24.5dB, which offers better results in wideband application. The Proposed antenna structure is simulated by software CST MWS (CST Microwave Studio) version 2018 and later comparison results are also presented

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.

DC~10.6GHz Ultra Wideband SPDT Switch

2013 ◽  
Vol 798-799 ◽  
pp. 520-525 ◽  
Author(s):  
Cheng Peng Liu ◽  
Jian Gang Shi ◽  
Zheng Rong He ◽  
Wei Zou
Keyword(s):  
Insertion Loss ◽  
High Performance ◽  
Return Loss ◽  
Ultra Wideband ◽  
Trade Off ◽  
High Isolation ◽  
Low Insertion Loss ◽  
Off Time

a novel configuration for a novel ultra wideband switch is presented in this paper. This switch using 0.5um GaAs process in ADS2008 simulator. Switch should be designed to trade-off insertion loss, isolation, bandwidth, and return loss. The aims of design are to provide low insertion loss along with high isolation. The design using integration inductor and resistor in parallel, and this switch exhibits high performance: over DC-10.6GHz, insertion loss is lower than-1.624dB; the ripple variation of insertion loss is less than ±0.25dB; The isolation is lower than-51.336dB; input return loss is lower than-16.402dB; on state, output return loss is lower than-15.919dB; off state, output return loss is lower than-18.294dB; on and off time are less than 4ns.

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 Design of Horse Shoe Patch antenna for wireless Applications

2018 ◽  
Vol 3 (1) ◽  
pp. 14-16
Author(s):  
N. Jayanti ◽  
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Substrate Material ◽  
Antenna Design ◽  
Substrate Thickness ◽  
Far Field ◽  
Wireless Applications ◽  
Substrate Layer ◽  
Cst Microwave Studio

This paper illustrates the design and analysis of a horseshoe patch antenna and compares the results of antenna for Duroid (ɛr = 2.2), Rogers RO4350 (ɛr = 3.66) and FR-4 (ɛr = 4.3) as substrate material and another comparison is between proposed antenna with and without an upper layer of substrate (duroid). The substrate thickness taken for this antenna is 1.57mm and for the substrate layer above the patch, thickness is 0.2mm. Comparison of these different structures has been done on the basis of return loss, VSWR, efficiency, and far-field. In these structures, a horse shoe-shaped patch is placed above the substrate. The proposed antenna has been designed and simulated using CST microwave studio 2014. The proposed antenna design can be used for WLAN, WiMAX, and IMT applications.

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