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

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.

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

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.

scholarly journals Novel Design of Microstrip Antenna with Improved Bandwidth

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Km. Kamakshi ◽  
Ashish Singh ◽  
Mohammad Aneesh ◽  
J. A. Ansari
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Proper Selection ◽  
Antenna Structure ◽  
Inclination Angles ◽  
Broadside Radiation ◽  
Novel Design ◽  
Selection Of ◽  
Good Agreement

A novel design of broadband patch antenna is presented in this paper. The broadband property of the proposed antenna is achieved by choosing a proper selection of dimensions and positions of slot and notch on the radiating patch. The bandwidth of the proposed antenna is found to be 30.5% with operating frequency band from 1.56 GHz to 2.12 GHz. Antenna characteristics are observed for different inclination angles “α” and its effect on bandwidths is also reported. The maximum gain of the antenna is found to be 9.86 dBi and it achieves broadside radiation pattern in the direction of maximum radiation over the operating band. The proposed antenna structure is simulated, fabricated, and tested for obtaining the desired performance. The simulated results are verified with experimental results which are in good agreement.

scholarly journals A Stacked Planar Antenna with Switchable Small Grid Pixel Structure for Directive High Beam Steering Broadside Radiation

2018 ◽  
Vol 7 (2.5) ◽  
pp. 122 ◽  
Author(s):  
Devakumaran Subramaniam ◽  
Muzammil Jusoh ◽  
Thennarasan Sabapathy ◽  
Mohamed Nasrun Osman ◽  
Muhammad Ramlee Kamarudin ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Current Distribution ◽  
Return Loss ◽  
Beam Steering ◽  
Bottom Layer ◽  
Pin Diode ◽  
Planar Antenna ◽  
High Beam ◽  
X Band ◽  
Broadside Radiation

A radiation pattern of a reconfigurable pixel structure antenna that operates in three steerable beam directions of {-40º, 0º, 40º} is presented. The proposed antenna consists of a circular driven structure on the bottom layer with a pixel structure placed in the top layer. The pixel structures of small square-shaped metallic patches are used to provide beam steering reconfiguration capabilities to the antenna. The adjacent pixels are connected by PIN diode switches with ON/OFF status to change the electrical geometry of the pixel surface, which changes the current distribution on the antenna, thus provides reconfigurability in beam steering direction. The proposed antenna operates at 9.5GHz frequency for X-Band radar application. This antenna is capable to achieve a tolerable return loss of less than -10dB with an average gain of 8 dBi at all desired angles. 

scholarly journals Slot Loaded Capacitive fed Suspended RMSA with Meandered Ground Plane

2018 ◽  
Vol 7 (1) ◽  
pp. 49
Author(s):  
Ravi M. Yadahalli ◽  
Nandini M. Ammanagi
Keyword(s):  
Radiation Pattern ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Small Patch ◽  
Rectangular Patch ◽  
Broadside Radiation ◽  
Coaxial Probe

In this paper, variations in the Capacitive fed suspended RMSA configurations have been proposed. Initially, the reference antenna consists of rectangular patch of size of (35.5 X 45.6) mm<sup>2</sup> and a small rectangular feed patch of size of (1.4 X 4) mm<sup>2 </sup>residing on the same substrate suspended above the ground plane. Coaxial probe is used to feed the small patch which in turn excites the radiator patch electromagnetically, yielding a large impedance bandwidth (BW) of 39%, with good gain and broadside radiation pattern.  By, meandering the ground plane of reference antenna with three rectangular slots, the prototype antenna is fabricated and measurement has been carried out to validate the result for compact broadband response. Later, by loading a pair of rectangular slots in the radiating patch of the reference antenna in addition to the rectangular slots in the ground plane, the prototype antenna is fabricated and measurement has been carried out to validate the result for compact dual band response.

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