scholarly journals Entwurfskonzept einer Car2Car-Multiband-Dachantenne

2012 ◽  
Vol 10 ◽  
pp. 63-68
Author(s):  
Y. Wang ◽  
M. Reit ◽  
W. Mathis
Keyword(s):  
Radiation Pattern ◽  
Horizontal Plane ◽  
Design Concept ◽  
Antenna Design ◽  
Average Gain ◽  
Wideband Antenna ◽  
Measurement Results ◽  
Antenna Length ◽  
Antenna Systems ◽  
Multi Band

Abstract. Due to the vastly increasing use of wireless services in the car, such as WiFi, Car2Car and LTE, the requirements on bandwidth and radiation pattern of the roof antenna systems become more challenging. In this work, a design concept for multi-band roof antenna systems is presented. We aim to get a higher bandwidth and an almost circular radiation pattern on the horizontal plane. Moreover, the antenna length is considered in order to fulfill the requirements set by construction ECE-regulations (ECE, 2010). The applicability of the design concept is not limited to multi-band roof antennas, it can also be used for a general wideband antenna design. For illustration of this concept, a multi-band roof antenna with a bandwidth of 780 MHz to 5.9 GHz and a near circular radiation pattern with an average gain of G = 3 dBi (at 5.9 GHz) on the horizontal plane is designed. The simulation and measurement results are presented.

scholarly journals Proposal of a Planar Directional UWB Antenna for Any Desired Operational Bandwidth

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Marco A. Peyrot-Solís ◽  
Giselle M. Galvan-Tejada ◽  
Hildeberto Jardon-Aguilar
Keyword(s):  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Cutoff Frequency ◽  
Simple Equation ◽  
Antenna Design ◽  
Uwb Antenna ◽  
Average Gain ◽  
Directional Radiation ◽  
Elliptic Cone ◽  
Lower Cutoff

A novel planar directional UWB antenna is proposed. The antenna design evolves from an oblique elliptic cone antenna by applying the planar-solid correspondence to two axes. Through a simple equation, this antenna can be designed, to operate at a specific lower cutoff frequency with a bandwidth larger than 10 GHz for a reflection coefficient magnitude lower than −10 dB. This characteristic provides the antenna with a good versatility. The directional radiation pattern has an average gain of 6 dBi.

scholarly journals The Simulation and Experiment of a Non-Cross-Feeding Printed Log-Periodic Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Chun-Ying Kang ◽  
Shu Lin ◽  
Zhi-Hua Zhao ◽  
Li-Wen Jing
Keyword(s):  
Radiation Pattern ◽  
Coaxial Line ◽  
Antenna Design ◽  
Wideband Antenna ◽  
Feeding Structure ◽  
Simulation And Experiment ◽  
Log Periodic Antenna ◽  
Simulation Results ◽  
Antenna Model ◽  
Cst Microwave Studio

A non-cross-fed printed log-periodic antenna is simulated and studied experimentally. To avoid complex feeding with long coaxial line, the non-cross-feeding structure is applied in this antenna. The software CST Microwave Studio is employed to simulate the proposed antenna, and the optimized antenna model is obtained. According to the simulation results, the antenna prototype is produced and measured. Simulation and measured results show that the antenna is withS11<-10 dB in band of 4.2–9.2 GHz. And the radiation pattern and gain vary steadily in this band, which achieves requirements for wideband antenna. This antenna design can be extended to the design of the antenna integrated in communication circuit.

3-dB Radiation Beamwidth Adjustment for E-Shaped Microstrip Antennas

2014 ◽  
Vol 668-669 ◽  
pp. 1189-1193
Author(s):  
Geng Zhang ◽  
Chi Gao ◽  
Zi Bin Weng
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
Patch Antenna ◽  
Microstrip Antennas ◽  
Microstrip Patch Antenna ◽  
Antenna Design ◽  
Optimum Frequency ◽  
Substrate Use ◽  
Wideband Antenna ◽  
Microstrip Patch

This paper introduces a simple, E-shaped slot loaded wideband microstrip patch antenna with a metallic cavity. The antenna design is an improvement from previous research and it is simulated using HFSS 13 software. The performance of the designed antenna was analyzed in term of bandwidth, gain, VSWR, and radiation pattern. What does the substrate use is air. The results show the wideband antenna is able to operate from 190MHz to 230MHz frequency band with optimum frequency at 210MHz, and the 3-dB radiation beamwidth of the E and the H plane at the 210MHz are 61° and 51°. However, the 3-dB radiation beamwidth of the E and the H plane at the 210MHz can be adjusted to 70° by using a metallic cavity.

scholarly journals Inscribed Fibonacci Circle Fractal in a Circular Radiator for Ultra-Wideband Antenna Operation and Size Reduction

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
J. A. Tirado-Mendez ◽  
D. Martinez-Lara ◽  
H. Jardon-Aguilar ◽  
R. Flores-Leal ◽  
E. A. Andrade-Gonzalez
Keyword(s):  
Radiation Pattern ◽  
Group Delay ◽  
Size Reduction ◽  
Ultra Wideband ◽  
Fibonacci Series ◽  
Average Gain ◽  
Wideband Antenna ◽  
The Third

In this article, a Fibonacci circle fractal is inscribed into a circular radiator in order to provide ultra-wideband behavior as well as a 50% size reduction compared to a conventional circular monopole. The third iteration of the Fibonacci series allows the antenna to obtain a steady S11 parameter over the operation bandwidth, going from 2.7 GHz to 14 GHz, an average gain around 1 dB, with a quasi-omnidirectional radiation pattern and a group delay no bigger than 1 ns, suitable for short-pulsed communications.

A Novel Wideband Antenna Design Using U-slot

PIERS Online ◽  
2007 ◽  
Vol 3 (7) ◽  
pp. 1067-1070 ◽  
Author(s):  
Wenwen Chai ◽  
Xiaojuan Zhang ◽  
Jibang Liu
Keyword(s):  
Antenna Design ◽  
Wideband Antenna

Investigation of the Accuracy of Reference Instruments for Measuring Vertical Angles by Reference Method of Their Calibration

2020 ◽  
pp. 3-14
Author(s):  
O. M. Samoylenko ◽  
O. V. Adamenko ◽  
B. P. Kukareka
Keyword(s):  
Horizontal Plane ◽  
Opposite Sign ◽  
Reference Method ◽  
Angle Measurement ◽  
Measurement Standard ◽  
Vertical Angle ◽  
Measurement Standards ◽  
Measurement Results ◽  
Electronic Measurement ◽  
Systematic Biases

Reference method for simultaneous calibration of the three and more measurement standards for vertical angle measurement is developed. This method can to use for obtaining the systematic biases of the vertical angles measurements for each of the measuring standards relative of the horizontal plain was averaged from measurement results in time their calibration or comparison. For realization of the reference method was developed the autocollimationel electronic measurement standard for the automatization measurement of the vertical angles SeaLineZero_Standard™ (SLZ_S™). Summary standard deviation (k=1) of the vertical angle measurement relative the horizontal plane, from the results of their calibration by reference method, is not more 0,07ʺ…0,15ʺ. This result was obtained without the use the systematic biases, for each measurement standards, as measurements corrections (with opposite sign). The measuring standards, that were developed and researched, are necessary for obtaining the systematic biases of the vertical angle measurement for total stations and theodolites, that have the normed standard error 0,5ʺ and 1ʺ, when these instruments are calibrating.

Miniature and near-3D omnidirectional radiation pattern RFID tag antenna design

2009 ◽  
Vol 45 (18) ◽  
pp. 923 ◽  
Author(s):  
S.-L. Chen ◽  
K.-H. Lin ◽  
R. Mittra
Keyword(s):  
Radiation Pattern ◽  
Antenna Design ◽  
Rfid Tag
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