On the advantages of magnetic materials in microstrip antenna miniaturization

2008 ◽  
Vol 50 (12) ◽  
pp. 3131-3134 ◽  
Author(s):  
Pekka Ikonen ◽  
Sergei Tretyakov
Keyword(s):  
Magnetic Materials ◽  
Microstrip Antenna ◽  
Antenna Miniaturization

Research and Design of Magnetic Substrate Microstrip Antenna with Electromagnetic Band-Gap Structure

2014 ◽  
Vol 685 ◽  
pp. 314-319
Author(s):  
Hong Yang ◽  
Dan Liu ◽  
Wei Chen
Keyword(s):  
Magnetic Material ◽  
Magnetic Materials ◽  
Microstrip Antenna ◽  
Antenna Gain ◽  
Radiation Characteristics ◽  
Relative Bandwidth ◽  
Magnetic Substrate ◽  
Gain Loss ◽  
Band Gap Structure ◽  
Research And Design

Based on the magnetic materials (JV-5) substrate, Double L-shaped slot microstrip antenna is designed. The bandwidth is over 2 times that of the normal substrate and a 40% reduction in size happens.. On this basis, the microstrip antenna with magnetic substrate EBG structure is designed and the EBG structure uses the corrosive effects of joint floor, namely getting periodic H-shaped and circular structures by the floor corrosion, and performing a simulation with HFSS14.0. The results show that the EBG structure of magnetic material having a prominent advantage of the miniaturization and bandwidth-broaden compared to a microstrip antenna with non-magnetic materials substrate, resulting in more than 10% relative bandwidth and a slight gain loss. To some degree, introducing EBG structure can reduce the size of the antenna and increase its bandwidth, and it also improve the gain and radiation characteristics of the antenna.Key words: EBG structure; magnetic material;Double L-shaped slot microstrip antenna; gain

scholarly journals MICS/ISM Meander-Line Microstrip Antenna Encapsulated in Oblong-Shaped Pod for Gastrointestinal Tract Diagnosis

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3897
Author(s):  
Supakit Kawdungta ◽  
Akkarat Boonpoonga ◽  
Chuwong Phongcharoenpanich
Keyword(s):  
Gastrointestinal Tract ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Liquid Mixtures ◽  
Dielectric Constants ◽  
Antenna Structure ◽  
Antenna Miniaturization ◽  
Measured Impedance ◽  
Meander Line ◽  
Defected Ground Plane

In light of the growth in demand for multiband antennas for medical applications, this research proposes a MICS/ISM meander-line microstrip antenna encapsulated in an oblong-shaped pod for use in diagnoses of the gastrointestinal tract. The proposed antenna is operable in the Medical Implant Communication System (MICS) and the Industrial, Scientific and Medical (ISM) bands. The antenna structure consists of a meander-line radiating patch, a flipped-L defected ground plane, and a loading resistor for antenna miniaturization. The MICS/ISM microstrip antenna encapsulated in an oblong-shaped pod was simulated in various lossy-material environments. In addition, the specific absorption rate (SAR) was calculated and compared against the IEEE C95.1 standard. For verification, an antenna prototype was fabricated and experiments carried out in equivalent liquid mixtures, the dielectric constants of which resembled human tissue. The measured impedance bandwidths (|S11| ≤ −10 dB) for the MICS and ISM bands were 398–407 MHz and 2.41–2.48 GHz. The measured antenna gains were −38 dBi and −13 dBi, with a quasi-omnidirectional radiation pattern. The measured SAR was substantially below the maximum safety limits. As a result, the described MICS/ISM microstrip antenna encapsulated in an oblong-shaped pod can be used for real-time gastrointestinal tract diagnosis. The novelty of this work lies in the use of a meander-line microstrip, flipped-L defected ground plane, and loading resistor to miniaturize the antenna and realize the MICS and ISM bands.

scholarly journals Development of Meandered Microstrip Antenna for RFID Application

2018 ◽  
Vol 2 (02) ◽  
pp. 68
Author(s):  
Vista Agus Sria Warman ◽  
Radial Anwar ◽  
Yuyu Wahyu
Keyword(s):  
Communication Technology ◽  
Microstrip Antenna ◽  
Technology Development ◽  
Near Field ◽  
Resonance Wavelength ◽  
Frequency Measurement ◽  
Antenna Miniaturization ◽  
Miniaturized Antenna ◽  
Small Antenna ◽  
Mobile Communication Technology

Antenna miniaturization has become one important research, especially in mobile communication technology development. This paper presents the development of a miniaturized antenna for RFID application (924 MHz). Meandering technique has been adopted to create a geometrically small antenna relative to its operating frequency. Measurement result shows that the fabricated antenna inherits low return loss, down to -25.915 dB. The geometry of the antenna is 25.54 mm x 16 mm, which is much smaller than its resonance wavelength (0.079? x 0.049?). The measured gain is relatively small, of about -12 dBi. Nevertheless, the obtained parameters are acceptable since the antenna is meant for near field communication application.

Design and Simulation of Airborne Circular Omni-Directional Slot Antenna

2014 ◽  
Vol 989-994 ◽  
pp. 3497-3500
Author(s):  
Luo Ren ◽  
Yong Zhong Zhu ◽  
Dan Su ◽  
Xin Deng
Keyword(s):  
Microstrip Antenna ◽  
Directional Antenna ◽  
Monopole Antenna ◽  
Slot Antenna ◽  
Operating Frequency ◽  
Frequency Range ◽  
Maximum Gain ◽  
Antenna Miniaturization ◽  
Operating Frequency Range ◽  
The Common

The airborne omni-directional antenna must not only satisfy the indicators of omni-directional horizontal requirements, but also have conformal shape with the surface of airplane. The common monopole antenna and microstrip antenna can not meet the above requirements. Under the background of the airborne antenna miniaturization and conformal demand, this article designs a kind of airborne circular slot antenna. The structure of the antenna is simple, which meets pattern VSWR < 1.4 bandwidth of 350 MHz to 376 MHz and meets pattern VSWR < 2 bandwidth of 338 MHz to 438 MHz .Its maximum gain within the operating frequency range can be 4.205 dB .

scholarly journals Microstrip antenna miniaturization using partial dielectric material filling

2006 ◽  
Vol 49 (1) ◽  
pp. 155-159 ◽  
Author(s):  
Olli Luukkonen ◽  
Pekka Ikonen ◽  
Sergei Tretyakov
Keyword(s):  
Microstrip Antenna ◽  
Dielectric Material ◽  
Antenna Miniaturization

scholarly journals U-slot patch antenna with low RCS based on a metaferrite substrate

2019 ◽  
Vol 6 ◽  
pp. 20 ◽  
Author(s):  
Yujie Liu ◽  
Philip Beal ◽  
Henry Giddens ◽  
Yang Hao
Keyword(s):  
Genetic Algorithm ◽  
Electrical Properties ◽  
Magnetic Materials ◽  
Cross Section ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Impedance Matching ◽  
Microstrip Antennas ◽  
Artificial Substrates ◽  
Performance Improvements

Metamaterial ferrites or metaferrites are artificial magnetic materials which mimic the properties of ferrites at a certain frequency operation. Antenna engineers are therefore able to design and create artificial substrates which replicate the electrical properties of ferrites without actually using any in the construction. This is advantageous as ferrites can offer performance improvements to microstrip antennas, such as size reduction and wideband impedance matching. In this paper, a metaferrite substrate designed by the use of a genetic algorithm is presented. The metaferrite was optimized in order to obtain the magnetic responses at 9GHz, for its use as the substrate of a microstrip antenna. As an example, a U-slot patch antenna based on the metaferrite is demonstrated, which can achieve stable radiation and 14 dB radar cross section (RCS) reduction performance in the measurement.

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