A compact-size circularly polarized antenna using low-loss alumina substrates

This work presents the use of a three-element radiating structure for circularly polarized Low-Power Wide Area Network (LP-WAN) communication with space. The proposed structure has a 72 mm × 72 mm × 12 mm compact size with Right-Handed Circular Polarization (RHCP) and a 120∘ wide beamwidth radiation pattern. Printed on low-cost FR4 Epoxy substrate, a feeding network circuit based on Quasi Lumped Quadrature Coupler (QLQC), it achieves a −0.6 dB insertion loss and a very compact size. The final structure has a 69% total efficiency and a 3.14 dBic realized gain.

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Bandwidth-Enhanced Circularly Polarized Spiral Antenna With Compact Size

IEEE Access ◽

10.1109/access.2020.2976705 ◽

2020 ◽

Vol 8 ◽

pp. 41246-41253

Author(s):

Ling-Lu Chen ◽

Lei Chang ◽

Zhuang-Zhi Chen ◽

Qiao-Na Qiu

Keyword(s):

Spiral Antenna ◽

Circularly Polarized ◽

Compact Size

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Low-loss compact-size slotted waveguide polarization rotator and transformer

Optics Letters ◽

10.1364/ol.32.002131 ◽

2007 ◽

Vol 32 (15) ◽

pp. 2131 ◽

Cited By ~ 33

Author(s):

Ning-Ning Feng ◽

Rong Sun ◽

Jurgen Michel ◽

Lionel C. Kimerling

Keyword(s):

Low Loss ◽

Polarization Rotator ◽

Compact Size ◽

Slotted Waveguide

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Low-Loss Circularly Polarized Periodic Leaky-Wave Antenna

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2015.2463672 ◽

2016 ◽

Vol 15 ◽

pp. 614-617 ◽

Cited By ~ 11

Author(s):

Daniel Sanchez-Escuderos ◽

Miguel Ferrando-Bataller ◽

Jose I. Herranz ◽

Vicent Miquel Rodrigo-Penarrocha

Keyword(s):

Low Loss ◽

Leaky Wave ◽

Circularly Polarized ◽

Leaky Wave Antenna ◽

Wave Antenna

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Design of Tunable Equalizers Using Multilayered Half Mode Substrate Integrated Waveguide Structures Added Absorbing Pillars

Advances in Materials Science and Engineering ◽

10.1155/2015/645638 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

Shuxing Wang ◽

Yongfei Wang ◽

Dewei Zhang ◽

Yi Zhang ◽

Dongfang Zhou

Keyword(s):

Multilayer Structure ◽

Design Method ◽

The Other ◽

Mode Analysis ◽

Substrate Integrated Waveguide ◽

Low Loss ◽

Resonant Cavities ◽

Bottom Substrate ◽

Compact Size ◽

First Time

An equalizer based on multilayered half mode substrate integrated waveguide (HMSIW) structures with highQ-factor, low loss, and compact size is proposed for the first time. Resonant cavities distributing in the upper substrate and the bottom substrate, with the middle substrate layer which works as the transmission line together, constitute a multilayer structure. The design method and theoretical analysis are summarized first. The mode analysis, simulated results, and measured results are all provided. The measured results show a good performance and are in agreement with the simulated results, and the maximum attenuation slope reaches −16 dB over 12.5 GHz~14.5 GHz. With the use of absorbing pillars, the attenuation andQvalue can be tuned more easily than the other planar equalizers. Compared with the SIW equalizer, the size of this structure reduces by 50%. Furthermore, this structure is suitable for the miniaturization development of equalizers.

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A Low-Loss Self-Packaged Magic-T With Compact Size Using SISL Technology

IEEE Microwave and Wireless Components Letters ◽

10.1109/lmwc.2017.2766566 ◽

2018 ◽

Vol 28 (1) ◽

pp. 13-15 ◽

Cited By ~ 3

Author(s):

Yongqiang Wang ◽

Kaixue Ma ◽

Shouxian Mou

Keyword(s):

Low Loss ◽

Compact Size

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A low-loss circularly polarized dichroic plate

10.1109/aps.1971.1150930 ◽

2005 ◽

Cited By ~ 4

Author(s):

R. Woo

Keyword(s):

Low Loss ◽

Circularly Polarized

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Miniaturized Circularly Polarized Implantable Antenna for ISM-Band Biomedical Devices

International Journal of Antennas and Propagation ◽

10.1155/2017/9750257 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9 ◽

Cited By ~ 11

Author(s):

Ke Zhang ◽

Changrong Liu ◽

Xueguan Liu ◽

Huiping Guo ◽

Xinmi Yang

Keyword(s):

Patch Antenna ◽

Axial Ratio ◽

Microstrip Patch Antenna ◽

Impedance Bandwidth ◽

Optimized Design ◽

Circularly Polarized ◽

Ism Band ◽

Microstrip Patch ◽

Compact Size ◽

Implantable Antenna

A compact circularly polarized antenna operating at 915 MHz industrial, scientific, and medical (ISM) band for biomedical implantable applications is presented and experimentally measured. The proposed antenna can be miniaturized to a large extent with the compact size of 15 × 15 × 1.27 mm3 by means of loading patches to a ring-shaped microstrip patch antenna. An impedance bandwidth of 10.6% (865–962 MHz) for reflection coefficient less than −10 dB can be obtained. Meanwhile, the simulated 3 dB axial-ratio (AR) bandwidth reaches 14 MHz. Finally, the optimized design was fabricated and tested, and the measured results agree well with simulated results.

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