scholarly journals Coplanar Stripline-Fed Wideband Yagi Dipole Antenna with Filtering-Radiating Performance

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1258
Author(s):  
Yong Chen ◽  
Gege Lu ◽  
Shiyan Wang ◽  
Jianpeng Wang
Keyword(s):  
High Frequency ◽  
Dipole Antenna ◽  
Frequency Selectivity ◽  
Antenna Design ◽  
Initial Structure ◽  
Coplanar Stripline ◽  
Half Wavelength ◽  
Yagi Antenna ◽  
Operating Bandwidth ◽  
Good Agreement

In this article, a wideband filtering-radiating Yagi dipole antenna with the coplanar stripline (CPS) excitation form is investigated, designed, and fabricated. By introducing an open-circuited half-wavelength resonator between the CPS structure and dipole, the gain selectivity has been improved and the operating bandwidth is simultaneously enhanced. Then, the intrinsic filtering-radiating performance of Yagi antenna is studied. By implementing a reflector on initial structure, it is observed that two radiation nulls appear at both lower and upper gain passband edges, respectively. Moreover, in order to improve the selectivity in the upper stopband, a pair of U-shaped resonators are employed and coupled to CPS directly. As such, the antenna design is finally completed with expected characteristics. To verify the feasibility of the proposed scheme, a filtering Yagi antenna prototype with a wide bandwidth covering from 3.64 GHz to 4.38 GHz is designed, fabricated, and measured. Both simulated and measured results are found to be in good agreement, thus demonstrating that the presented antenna has the performances of high frequency selectivity and stable in-band gain.

scholarly journals Low-Profile Spidron Fractal Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor for Manpack Applications

2020 ◽  
Vol 10 (24) ◽  
pp. 8843
Author(s):  
Oh Heon Kwon ◽  
Keum Cheol Hwang
Keyword(s):  
High Frequency ◽  
Dipole Antenna ◽  
Magnetic Conductor ◽  
Very High Frequency ◽  
Artificial Magnetic Conductor ◽  
Received Power ◽  
Low Profile ◽  
Profile Characteristics ◽  
Very High ◽  
Good Agreement

In this paper, a Spidron fractal dipole antenna with a ferrite-loaded artificial magnetic conductor (AMC) is presented. By applying ferrite composed of nickel–zinc with a high permeability value, a compact AMC that operates in the broadband frequency range within the high-frequency/very-high-frequency/ultra-high-frequency (HF/VHF/UHF) bands was designed. A Spidron fractal-shaped dipole antenna with a quasi-self-complementary structure was designed and combined with a miniaturized ferrite-loaded AMC. This allowed the designed AMC-integrated dipole antenna to operate in a wide frequency band, covering the HF/VHF/UHF bands, with low-profile characteristics. A prototype of the proposed Spidron fractal dipole antenna with the AMC was manufactured and measured and found to meet low VSWR (voltage standing wave radios) specifications of <3.5 within the 20–500 MHz bandwidth range. The simulated and measured results are in good agreement. The size of the Spidron fractal dipole antenna with the AMC is 0.03×0.026×0.001λ3 relative to the wavelength of the lowest operating frequency. The received power of the Spidron fractal dipole antenna with the AMC was also measured when it was applied to relatively small applications, such as a manpack in this case.

scholarly journals Balance Analysis of Microstrip-to-CPS Baluns and Its Effects on Broadband Antenna Performance

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Dong Sik Woo ◽  
Young-Ki Cho ◽  
Kang Wook Kim
Keyword(s):  
Delay Line ◽  
Phase Delay ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Broadband Antenna ◽  
Coplanar Stripline ◽  
Antenna Performance ◽  
Yagi Antenna ◽  
Balance Analysis ◽  
Operating Bandwidth

Amplitude and phase balances of two types of microstrip-(MS-) to-coplanar stripline (CPS) baluns have been analyzed through simulations and measurements, and their effects on broadband antenna performance are investigated. The impedance bandwidth of the balun determined by a back-to-back configuration can sometimes overestimate the balun operating bandwidth. With the conventional balun with a 180° phase delay line, it is observed that the balun balance over the operating frequencies becomes much more improved as the CPS length increases to over 0.1 λg. As compared with the conventional balun, the proposed MS-to-CPS balun demonstrated very wideband performance from 5 to over 20 GHz. With the proposed balun, amplitude and phase imbalances are within 1 dB and ±5°, respectively. Effects of the balun imbalance on overall broadband antenna performance are also discussed with a quasi-Yagi antenna and a narrow beamwidth tapered slot antenna (TSA).

Compact ultra-wideband bandpass-response power divider with high-frequency selectivity

2018 ◽  
Vol 10 (10) ◽  
pp. 1107-1112 ◽  
Author(s):  
Song Guo ◽  
Kaijun Song ◽  
Yedi Zhou ◽  
Yong Fan
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Open Circuit ◽  
Frequency Selectivity ◽  
Ultra Wideband ◽  
Power Divider ◽  
Transmission Zeros ◽  
Equivalent Circuit Method ◽  
Impedance Converter ◽  
Good Agreement

AbstractThe ultra-wideband bandpass-response power divider with high-frequency selectivity is presented in this paper. This power divider consists of an impedance transformer, a filter network, and two isolation resistors. In order to realize the ultra-wideband filtering performance, parallel coupling lines and parallel open-circuit branches are applied to the second impedance converter. A resistor is added to the ends of the coupling lines to achieve good isolation and output return loss. The equivalent-circuit method is employed to analyze the presented power divider. The power divider, working at 3.45–8.29 GHz, is designed and fabricated. Two transmission zeros are generated at 2.8 and 9 GHz, respectively, and the out-of-band suppression is >13 dB. The measured results are in good agreement with the simulation ones.

scholarly journals Yagi Antenna Design and Analysis 11 Folded Dipole Feeding Elements for VoIP Networks

2015 ◽  
Vol 1 (1) ◽  
pp. 19-25
Author(s):  
Fandy Himawan
Keyword(s):  
Dipole Antenna ◽  
Antenna Design ◽  
Long Distance ◽  
Directional Radiation ◽  
Wireless Router ◽  
Yagi Antenna ◽  
Matching Technique ◽  
Folded Dipole ◽  
Better Than

The problem that often occurs in VOIP networks using wireless media is the weak signal received and transmitted by the transceiver device at a long distance from the wireless router, so that the quality of VOIP service is often disconnected. The purpose of this research is to design and realize an 11 element yagi antenna with folded feed elements. dipole as an antenna for a transceiver device whose gain is better than a built-in antenna, so that it can support VOIP services. Yagi antenna is an antenna consisting of 3 elements, namely a reflector element, a driven element and a director element. The reflector element and the director element cause the yagi antenna to be directional so that a large gain is obtained from a certain point, while the driven one is used is a folded dipole antenna which has an impedance of 300 ohms so that the matching technique to the 50 ohm transmission line becomes easier. Ghz is less than 1.5 and RL is less than -14 dB. The bandwidth obtained is 620 MHz, the gain is 16.08 dBi with directional radiation and linear polarization. In implementation, the VOIP service is stable at a distance of 50 m using a yagi antenna, compared to the less stable built-in antenna.

A Novel Triple-Band Dipole Antenna for WLAN/WiMAX/LTE Applications

Frequenz ◽  
2018 ◽  
Vol 72 (7-8) ◽  
pp. 353-358
Author(s):  
Chen-yang Shuai ◽  
Guang-ming Wang
Keyword(s):  
Reflection Coefficient ◽  
Frequency Band ◽  
Microstrip Line ◽  
Simple Structure ◽  
Dipole Antenna ◽  
Operating Frequency ◽  
Coplanar Stripline ◽  
Bow Tie ◽  
Good Agreement ◽  
Triple Band

Abstract In this paper, a novel triple-band dipole antenna is presented. The proposed antenna has a very simple structure and is easily designed. The idea of the antenna is based on the traditional wideband bow-tie dipole antenna. Via etching slots on the bow-tie patch, three bent dipoles with different lengths which correspond to different operating frequencies are formed. Hence, the triple-band antenna is generated. Each operating frequency band realizes wideband and can be adjusted almost independently. And the antenna is fed by a 50 Ω microstrip line and a wideband microtrip-to-coplanar-stripline (CPS) transition as a balun. The good performances of the proposed antenna are achieved by a mass of simulations and measurements. The measured results have a good agreement with the simulated ones. The results show that the proposed antenna obtains three bandwidths at 2.38~2.65 GHz (10.7 %), 3.17~4.08 GHz (25.1 %), and 4.75~6.00 GHz (23.2 %) with the reflection coefficient less than −10 dB. In addition, the stable gain and quasi-omnidirectional radiation patterns are obtained in the operating frequency bands. Therefore, the proposed antenna is suitable for WLAN/WiMAX/LTE applications.

scholarly journals Modeling and Simulation of Dual-band Yagi Antennas for Voice Communication on Microsatellite

2019 ◽  
Vol 11 (3) ◽  
pp. 68-72
Author(s):  
Muhammad Darsono ◽  
Ahmad Ruri Wijaya ◽  
Rommy Hartono
Keyword(s):  
Beam Width ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Antenna Element ◽  
Method Of Moment ◽  
Voice Communication ◽  
Software Application ◽  
Copper Pipe ◽  
Yagi Antenna

The design of the dual-band Yagi antenna was developed to support voice communication through voice repeaters on microsatellites in the UHF-VHV frequency from ground stations. The Yagi antenna is a type of half lambda dipole antenna that makes it easy to obtain direction and increase gain. The antenna is designed using the method of moment through a simulation with the CST microwave studio software application. The design used as an antenna element material is a type of copper pipe cylinder. The results of the Yagi antenna design in the VHF frequency consist of one driven element, one reflector element, and three director elements, while the UHF frequency consists of one reflector element and seven directors. The results of simulation parameters are obtained, such as Bandwidth of return loss below 10 dB is 4.3 MHz(VHF), and 44 MHz (UHF), VSWR (2:1) is 1.24 (VHF) and 1.36 (UHF), Gain is 9.19 dBi (VHF) and 10.5 dBi (UHF) and Beam Width is 64 degree (VHF) and 58 degree (UHF). The suitability of the antenna design target is dual-band, and Gain value in UHF is higher than VHF.

A Compact Differential Filtering Quasi-Yagi Antenna With High Frequency Selectivity and Low Cross-Polarization Levels

2015 ◽  
Vol 14 ◽  
pp. 1573-1576 ◽  
Author(s):  
Jin Shi ◽  
Xu Wu ◽  
Zhi Ning Chen ◽  
Xianming Qing ◽  
Longlong Lin ◽  
...  
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Cross Polarization ◽  
Yagi Antenna

scholarly journals A Wide Stopband Balun Bandpass Filter with Its Application to Balanced Quasi-Yagi Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Gang Zhang ◽  
Zhenyao Qian ◽  
Yushou Chen ◽  
Yang Zhao
Keyword(s):  
Microstrip Line ◽  
Bandpass Filter ◽  
Harmonic Suppression ◽  
Fractional Bandwidth ◽  
Central Frequency ◽  
Half Wavelength ◽  
Yagi Antenna ◽  
Wave Distribution ◽  
Operating Bandwidth ◽  
Triple Mode

A new microstrip balun bandpass filter (BPF) with wide stopband is presented. It is realized by utilizing the out-of-phase feature of standing-wave distribution on a half-wavelength (λ/2) open-ended microstrip line and the resonant characteristics of the triple-mode resonators. For demonstration, a prototype balun BPF operating at central frequency (f0) of 2.34 GHz with fractional bandwidth (FBW) of about 16.7% is designed. The presented balun BPF not only exhibits nice balanced response with 0.47 dB magnitude imbalance and 4.3° phase difference but also achieves 30-dB harmonic suppression up to 6.40 GHz (2.7f0). Afterward, this presented design is embedded into a balanced quasi-Yagi antenna to obtain high-selective radiation and wide stopband rejection. Experimental results of the implemented antenna indicate less than −10 dB reflection coefficient, 4.49–5.38 dBi gain, and 12.71–19.62 dB front-to-back ratio within the operating bandwidth.

scholarly journals Design of compact reconfigurable UWB antenna with WiMAX and WLAN band rejection

2020 ◽  
Vol 17 (3) ◽  
pp. 1427
Author(s):  
N. F. Miswadi ◽  
M. T. Ali
Keyword(s):  
Electromagnetic Interference ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Parasitic Element ◽  
Uwb Antennas ◽  
Operating Bandwidth ◽  
Good Agreement

Two reconfigurable UWB antennas with band rejection characteristics are presented in this paper. By applying concept of parasitic element and etching slot in these two proposed antenna design WiMAX and WLAN band rejection are obtained, respectively to avoid potential electromagnetic interference (EMI). The proposed antennas are printed on 30mm x 40 mm Rogers5880 substrate. Furthermore, ideal switches are employed to achieve switchable band rejection UWB antenna.In this paper, two designs of reconfigurable UWB antenna with band rejection were proposed; namely a reconfigurable UWB antenna with WiMAX band rejection (Antenna 1), reconfigurable UWB antenna with WLAN band rejection (Antenna 2). The proposed antennas were successfully simulated, fabricated and measured. The Antenna 1 have impedance bandwidth from 2.99 GHz to 10.58 GHz with band rejection at 3.52GHz by utilizing C-shaped parasitic stripline. Meanwhile, Antenna 2 achieved an operating bandwidth from 2.99 – 10.82GHz with VSWR less than 2 except for the WLAN band operating at 4.92 – 5.84 GHz.The measured results for both antennas show good agreement with simulated ones.

Sign in / Sign up

Export Citation Format

Share Document