Frequency tunable monopole coupled loop antenna with broadside radiation pattern

2009 ◽  
Vol 45 (23) ◽  
pp. 1149 ◽  
Author(s):  
M. Abdallah ◽  
L. Le Coq ◽  
F. Colombel ◽  
G. Le Ray ◽  
M. Himdi
Keyword(s):  
Radiation Pattern ◽  
Loop Antenna ◽  
Frequency Tunable ◽  
Broadside Radiation

Smart DRA for beam width and orientation control

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 383-392
Author(s):  
Rajveer S. Yaduvanshi ◽  
Richa Gupta ◽  
Saurabh Katiyar
Keyword(s):  
Radiation Pattern ◽  
High Efficiency ◽  
Beam Width ◽  
Beam Control ◽  
Design Flexibility ◽  
Compact Size ◽  
Close Proximity ◽  
Cellular Communication Network ◽  
Arc Shape ◽  
Broadside Radiation

AbstractSmartdielectric resonator antenna (DRA) having beam control mechanism is anew area to be explored by antenna researchers. Proposed new geometry DRA has low loss, design flexibility, high efficiency, compact size and desired radiated beam control. Developing beam control in new geometry DRAs is investigated for the first time in this letter. Unique technique for beam control and beam width control is proposed using pit top and mount top DRA. Gain is controlled from 5.0 to 9.98 dBi and beam is controlled from ±30° to ±70° in broadside radiation pattern. U shape pit DRA has maximum directive gain of 9.98 dBi and efficiency 98% at 5.8 GHz frequency. Measured and simulated results of radiation pattern and reflection coefficient are found to be in close proximity. Hardware of U shape pit top DRA, mount top DRA, left side arc top DRA, right side arc shape top DRA is developed and investigated. Mobile and cellular communication network need wide coverage, hence large beam width is required. Narrowing of beam width at higher order mode is also achieved.

Bandwidth Behavior and Improvement of Miniature Cavity Antennas With Broadside Radiation Pattern Using a Metasurface

2015 ◽  
Vol 63 (5) ◽  
pp. 1899-1908 ◽  
Author(s):  
Mario Martinis ◽  
Kourosh Mahdjoubi ◽  
Ronan Sauleau ◽  
Sylvain Collardey ◽  
Loic Bernard
Keyword(s):  
Radiation Pattern ◽  
Broadside Radiation

scholarly journals Balanced gain for a square metaloop antenna

2019 ◽  
Vol 6 ◽  
pp. 3
Author(s):  
Hisamatsu Nakano ◽  
Ittoku Yoshino ◽  
Tomoki Abe ◽  
Junji Yamauchi
Keyword(s):  
Frequency Response ◽  
Radiation Pattern ◽  
Free Space ◽  
Loop Antenna ◽  
Circularly Polarized ◽  
Left Handed ◽  
The Difference

A square loop antenna implemented using a metamaterial line, referred to as a metaloop, is discussed. The metaloop radiates a counter circularly polarized (CP) broadside beam when the loop circumference equals one guided wavelength. The frequency response of the gain shows two different maximum values: gain G Lmax for a left-handed CP wave at frequency fGLmax and gain GRmax for a right-handed CP wave at frequency fGRmax, where GLmax is smaller than GRmax. In order to increase GLmax, while not affecting the original GRmax as much as possible (i.e. balance the gain), a parasitic natural conducting loop (paraloop), whose circumference is one free-space wavelength at fGLmax, is placed at height Hpara above the metaloop. It is found that the difference in the gains can be reduced by choosing an appropriate Hpara. The radiation pattern at fGLmax is narrowed by the paraloop, while the VSWR is not remarkably affected.

Frequency-Tunable Miniaturized Strip Loop Antenna Fed by a Coplanar Strip

2016 ◽  
Vol 15 ◽  
pp. 1000-1003 ◽  
Author(s):  
Hsin-Jou Huang ◽  
Cheng-Hao Tsai ◽  
Chien-Pai Lai ◽  
Shih-Yuan Chen
Keyword(s):  
Loop Antenna ◽  
Frequency Tunable

On Maximum Bandwidth of Rectangular Cavity Antennas With Broadside Radiation Pattern

2014 ◽  
Vol 13 ◽  
pp. 1709-1712 ◽  
Author(s):  
Mario Martinis ◽  
Kourosh Mahdjoubi ◽  
Ronan Sauleau ◽  
Sylvain Collardey ◽  
Loic Bernard ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Rectangular Cavity ◽  
Broadside Radiation

scholarly journals A Wearable Button Antenna Sensor for Dual-Mode Wireless Information and Power Transfer

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5678
Author(s):  
Jiahao Zhang ◽  
Jin Meng ◽  
Wei Li ◽  
Sen Yan ◽  
Guy A. E. Vandenbosch
Keyword(s):  
Radiation Pattern ◽  
Local Area ◽  
Power Transfer ◽  
Magnetic Conductor ◽  
Directional Radiation ◽  
Low Profile ◽  
The Stability ◽  
5 Ghz ◽  
Broadside Radiation ◽  
Body Energy

A novel wearable button antenna sensor is proposed for the concept of simultaneous wireless information and power transfer (SWIPT). This integrates two working modes for the transfer of power and information, respectively, and optimizes transfer efficiency. An omni-directional radiation pattern is achieved in the 3.5 GHz World Interoperability for Microwave Access (WiMAX) band to support on-body wireless communications, while a circularly polarized broadside radiation pattern is obtained in the 5 GHz wireless local area networks (WLAN) band to harvest power. The measured −10 dB return loss bandwidths are 4.0% (3.47–3.61 GHz) in the lower band, and 25.0% (4.51–5.80 GHz) in the higher band, respectively. An artificial magnetic conductor (AMC) structure with wideband characteristics is applied to obtain a low-profile design and to increase the stability of the antenna sensor. A high radiation efficiency of over 80% in the whole working band is observed. The specific absorption rate (SAR) of the proposed antenna sensor is below 0.509 W/kg at 3.55 GHz, and below 0.0532 W/kg at 5.5 GHz, respectively, which is much lower than the European standard threshold of 2 W/kg. All these characteristics make the designed antenna sensor suitable for on-body information transmission and off-body energy harvesting. The antenna sensor has been prototyped. Simulations and measurements agree well, proving the validity of the new concept.

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