A Yagi–Uda Antenna With a Stepped-Width Reflector Shorter Than the Driven Element

Luo, Yu; Chu, Qing‐Xin

doi:10.1109/lawp.2015.2458351

Cited by 50 publications

(36 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, we simultaneously used a Yagi–Uda antenna (Figure 15b) as the transmitting and receiving antenna to reduce the influence of multipath interference on the measurement results [31,32]. …”

Section: Field Test Verificationmentioning

confidence: 99%

Pseudorange Measurement Method Based on AIS Signals

Zhang

Wang

2017

Sensors

View full text Add to dashboard Cite

In order to use the existing automatic identification system (AIS) to provide additional navigation and positioning services, a complete pseudorange measurements solution is presented in this paper. Through the mathematical analysis of the AIS signal, the bit-0-phases in the digital sequences were determined as the timestamps. Monte Carlo simulation was carried out to compare the accuracy of the zero-crossing and differential peak, which are two timestamp detection methods in the additive white Gaussian noise (AWGN) channel. Considering the low-speed and low-dynamic motion characteristics of ships, an optimal estimation method based on the minimum mean square error is proposed to improve detection accuracy. Furthermore, the α difference filter algorithm was used to achieve the fusion of the optimal estimation results of the two detection methods. The results show that the algorithm can greatly improve the accuracy of pseudorange estimation under low signal-to-noise ratio (SNR) conditions. In order to verify the effectiveness of the scheme, prototypes containing the measurement scheme were developed and field tests in Xinghai Bay of Dalian (China) were performed. The test results show that the pseudorange measurement accuracy was better than 28 m (σ) without any modification of the existing AIS system.

show abstract

Section: Field Test Verificationmentioning

confidence: 99%

Pseudorange Measurement Method Based on AIS Signals

Zhang

Wang

2017

Sensors

View full text Add to dashboard Cite

show abstract

“…Since the left parasitic strip (A) is inductive, the phase of the current in parasitic element lags the dipole radiation element's current. 35 The current distribution changes when the µ c2 and µ c3 are set to 0 eV and 0.4 eV, respectively. In this case, the right (B) and left (A) parasitic strips act as a director and a reflector, respectively as shown in Figure 2(b).…”

Section: The Design Of a Two-beam Reconfigurable Yagi-uda Antennamentioning

confidence: 99%

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

Jiao

et al. 2016

AIP Advances

View full text Add to dashboard Cite

This paper presents a radiation pattern reconfigurable Yagi-Uda antenna based on graphene operating at terahertz frequencies. The antenna can be reconfigured to change the main beam pattern into two or four different radiation directions. The proposed antenna consists of a driven dipole radiation conductor, parasitic strips and embedded graphene. The hybrid graphene-metal implementation enables the antenna to have dynamic surface conductivity, which can be tuned by changing the chemical potentials. Therefore, the main beam direction, the resonance frequency, and the front-to-back ratio of the proposed antenna can be controlled by tuning the chemical potentials of the graphene embedded in different positions. The proposed two-beam reconfigurable Yagi-Uda antenna can achieve excellent unidirectional symmetrical radiation pattern with the front-to-back ratio of 11.9 dB and the10-dB impedance bandwidth of 15%. The different radiation directivity of the two-beam reconfigurable antenna can be achieved by controlling the chemical potentials of the graphene embedded in the parasitic stubs. The achievable peak gain of the proposed two-beam reconfigurable antenna is about 7.8 dB. Furthermore, we propose a four-beam reconfigurable Yagi-Uda antenna, which has stable reflection-coefficient performance although four main beams in reconfigurable cases point to four totally different directions. The corresponding peak gain, front-to-back ratio, and 10-dB impedance bandwidth of the four-beam reconfigurable antenna are about 6.4 dB, 12 dB, and 10%, respectively. Therefore, this novel design method of reconfigurable antennas is extremely promising for beam-scanning in terahertz and mid-infrared plasmonic devices and systems.

show abstract

“…As usual, the Yagi–Uda antenna comprises a folded dipole, a director and a reflector. To reduce the footprint of this antenna, a stepped‐width reflector is employed as previously investigated in .…”

Section: Antenna Design and Characteristicsmentioning

confidence: 99%

A differential‐fed Yagi–Uda antenna with enhanced bandwidth via addition of parasitic resonator

Luo

Chu

Børnemann

2016

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

A printed‐circuit differential‐fed Yagi–Uda antenna is presented that features enhanced bandwidth by employing a parasitic quarter‐wavelength coplanar stripline (CPS) resonator which adds one more resonant mode within the operating bandwidth. The proposed antenna is designed, fabricated and measured. Experimental results are in good agreement with simulations. In the band of 2.27–2.58 GHz, the return loss is better than 10 dB and the gain better than 6 dBi. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:156–159, 2017

show abstract

A Yagi–Uda Antenna With a Stepped-Width Reflector Shorter Than the Driven Element

Cited by 50 publications

References 13 publications

Pseudorange Measurement Method Based on AIS Signals

Pseudorange Measurement Method Based on AIS Signals

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

A differential‐fed Yagi–Uda antenna with enhanced bandwidth via addition of parasitic resonator

Contact Info

Product

Resources

About