A Multi-System and Dual-Band Miniaturization
Microstrip Antenna Loaded with CSRR for CNSS
Applications
Cao Jie, Liu-ZhiGang,
Fu Lu, Zhu Shou-zheng,
School of Information, East China Normal University, Shanghai, 200241, China
Email: surgeu@foxmail.com
Abstract-In this paper, a compact CSRR-loaded right- hand
circularly polarized (RHCP) circular-shaped microstrip patch
antenna is proposed in dual‐band operation. By embedding
CSRR slots and tuning stub on the microstrip antenna patches,
we can achieve the miniaturization and circular polarization
respectively. Besides, the multi-system and dual-band
performances are also achieved with the use of two stacked
circular microstrip patches. The simulation result is given in this
paper. The antenna operates in two frequency bands, with
B1=1.5754GHz, B3= 1.2685GHz and bandwidths are 57.8MHz
and 29.8MHz, respectively. In addition, the bandwidth of axial
ratio (AR<3dB) in B1 band is 24.4MHz and that in B3 is
28.1MHz. The operating frequency bandwidth and the axial ratio
bandwidth in two frequency bands both are exceeding 24MHz.
The antenna gains are about 6.47 dB in B1 and 3.63 dB in B3.
Meanwhile, the antenna total size is 65mm×65mm×8.28mm. The
characteristic of multi-system and the lower size make the
antenna suitable for CNSS (compass Navigation Satellite System),
GPS, and Galileo terminal applications.
Key Words- right-handed circular polarized (RHCP), tuning stub,
multi-system, dual frequency
I. INTRODUCTION
In recent years, multi-system terminal system of Compass
Navigation Satellite System (CNSS) has caused a significant
research interest because of its functions of navigation, high
precision, low fabrication cost and easy compatible with many
different navigation systems. To work with other navigation
system, the designing of the multi-system terminal antennas are
needed urgently.
With advantages such as low profile, low weight and useful
radiation characteristics, microstrip patch antennas have been
widely used in many circular polarization (CP) applications in
[1]. In terms of the dual-band design methods, there are two
kinds of microstrip antennas capable of dual-band in general:
a single patch and two stacked patches. Dual-band single-layer
single-feed patch antennas have been designed, by loading
two pairs of arc-shaped slots in a circular patch, and by
loading Y-shaped or T-shaped slots in square patch in [1] can
obtain these antennas. But their frequency ranges are too
narrow. Therefore, dual-frequency CP antenna using stacked
patches have been reported. They can be realized by
overlapping two truncated corners square patches without an
air-gap in [3] and by etching I-shaped [4] or S-shaped slots [5]
in square patch. Although good dual-band CP characteristics
can be achieved, the sizes are rather large for some
applications. The length of proposed antenna is 41mm, 65mm,
50mm shorter than the length in the paper in [3], [4], [5],
respectively.
In recent years, metamaterials and RIS technology are
widely used in antenna miniaturization. Besides, the RIS can
also enhance the gain and bandwidth of microstrip antenna in
[6]. Metamaterials, which exhibit unique electromagnetic
property not found in natural world, have been widely utilized
in microwave applications in [6]. Among them,
complementary split-ring resonators (CSRRs) were introduced
to exhibit negative permittivity and negative permeability in
[7]. In this paper, a CSRR slot-loaded dual-band RHCP
stacked microstrip antenna for multi-system function is
proposed, and the multi-system antenna can also work in GPS
and Galileo navigation systems. The antenna consists of three
layers which are the top and middle layer with two stacked
circular patches, and the bottom layer with a RIS structure.
The dual-band characteristic is achieved by two stacked
circular patches. The CP radiation and miniaturization are
achieved by adding tuning stub and CSRR, respectively.
Details and results of the proposed antenna are presented and
discussed.
II. A
NTENNA STRUCTURE AND ANALYSIS
The geometry of the proposed multi-system CP microstrip
patch antenna is shown in Fig.1.
Fig. 1. The geometry of the proposed antenna
0r
1r
2r
0
h
2
h
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a
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a
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R
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w
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'w
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(x_feed,0)
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(x_feed,0)
450
2014 3rd Asia-Pacific Conference on Antennas and Propagation
978-1-4799-4355-5/14/$31.00 ©2014 IEEE
Harbin, CHINA
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