scholarly journals Development of patch stack antenna for CP-SAR sensor

2021 ◽  
Vol 10 (1) ◽  
pp. 200-207
Author(s):  
Muhammad Fauzan Edy Purnomo ◽  
Vita Kusumasari ◽  
Rusmi Ambarwati ◽  
Sigit Kusmaryanto ◽  
Sholeh Hadi Pramono ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Synthetic Aperture ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Left Hand ◽  
S Parameter ◽  
Basic Configuration

In this paper, we obtain the basic configuration of the left-hand circular polarization (LHCP) array two patches stack triangular truncated microstrip antenna. This construction use the basic corporate feed microstrip-line with modified lossless T-junction power divider on radiating patch for circularly polarized-synthetic aperture radar (CP-SAR) sensor embedded on airspace with compact, small, and simple configuration. The design of Circular Polarization (CP) is realized by truncating the whole three tips and adjusting the parameters of antenna at the resonant frequency, f=5.2 GHz. The results of characteristic performance and S-parameter for the LHCP array two patches stack antenna at the resonant frequency show successively about 7.24 dBic of gain, 1.99 dB of axial ratio (Ar), and -11.43 dB of S-parameter. Moreover, the impedance bandwidth and the 3 dB-Ar bandwidth of this antenna are around 560 MHz (10.77%) and 50 MHz (0.96%), respectively.

scholarly journals LHCP four patches stack triangular truncated antenna using corporate feed microstrip-line for CP-SAR sensor

2021 ◽  
Vol 11 (5) ◽  
pp. 4125
Author(s):  
Muhammad Fauzan Edy Purnomo ◽  
Vita Kusumasari ◽  
Rudy Yuwono ◽  
Rahmadwati Rahmadwati ◽  
Rakhmad Romadhoni ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Axial Ratio ◽  
Synthetic Aperture ◽  
Impedance Bandwidth ◽  
Target Frequency ◽  
Left Hand ◽  
S Parameter ◽  
Aerial Vehicle

<span>In this paper, we acquire the configuration of the left-hand circular polarization (LHCP) array four patches stack triangular truncated microstrip antenna. This construction use the basic corporate feed microstrip-line with modified lossless T-junction power divider on radiating patch for circularly polarized-synthetic aperture radar (CP-SAR) sensor embedded on unmanned aerial vehicle (UAV) with compact, small, and simple configuration. The design of circular polarization (CP) is realized by truncating the whole three tips and adjusting the parameters of antenna at the target frequency, <em>f </em>= 5.2 GHz. The results of characteristic performance and <em>S</em>-parameter for the LHCP array four patches stack antenna at the target frequency show successively about 9.74 dBic of gain, 2.89 dB of axial ratio (<em>Ar</em>), and </span><span>-</span><span>10.91 dB of S-parameter. Moreover, the impedance bandwidth and the 3 dB-<em>Ar</em> bandwidth of this antenna are around 410 MHz (7.89%) and 100 MHz (1.92%), respectively.</span>

scholarly journals Triangular Microstrip Antenna for Circularly-Polarized Synthetic Aperture Radar Sensor Application

2018 ◽  
Vol 12 (1) ◽  
pp. 310 ◽  
Author(s):  
Muhammad Fauzan Edy Purnomo ◽  
Akio Kitagawa
Keyword(s):  
Resonant Frequency ◽  
Synthetic Aperture Radar ◽  
Circular Polarization ◽  
Axial Ratio ◽  
Microstrip Antennas ◽  
Synthetic Aperture ◽  
Power Divider ◽  
Circularly Polarized ◽  
S Parameter ◽  
Aperture Radar

<p>In this paper, we obtain the basic construction of triangular microstrip antennas based on the analysis of the single patch and array two patches. This construction use the basic corporate feeding-line with modified lossless T-junction power divider for Circularly Polarized-Synthetic Aperture Radar (CP-SAR) sensor embedded on airspace with compact, small, and simple configuration. The design of Circular Polarization (CP) is realized by truncating the whole three tips and adjusted the parameters of antennas at the resonant frequency, f = 1.25 GHz. The equations for reciprocal, lossless, and matched of the modified lossless T-junction power divider are also described. The result of characteristic performance and S-parameter for the single patch both Left-Hand Circular Polarization (LHCP) and Right-Hand Circular Polarization (RHCP) at the resonant frequency show consecutively 7.15 dBic and 7.16 dBic of gain, 0.12 dB and 0.11 dB of axial ratio, -26.75 dB and -26.72 dB of S-parameter. For array two patches, the result of gain, axial ratio, and S-parameter both of LHCP and RHCP are 7.63 dBic, 7.62 dBic, 2.68 dB, 2.74 dB, -19.43 dB, and -19.40 dB, respectively. The modified lossless T-junction power divider both for LHCP and RHCP are capable of being reciprocal, matched, and lossless at all ports.</p>

ANALYSIS PERFORMANCE OF SINGLY-FED CIRCULARLY POLARIZED MICROSTRIP ANTENNA FOR WIRELESS COMMUNICATION

2016 ◽  
Vol 78 (5-9) ◽  
Author(s):  
Muhammad Fauzan Edy Purnomo ◽  
Hadi Suyono ◽  
Panca Mudjirahardjo ◽  
Rini Nur Hasanah
Keyword(s):  
Wireless Communication ◽  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Microstrip Antennas ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Large Bandwidth ◽  
Doubly Fed

The circularly polarized (CP) microstrip antennas, both of singly- and doubly-fed types, possess inherent limitation in gain, impedance and axial-ratio bandwidths. These limitations are caused mainly by the natural resonance of the patch antenna which has a high unloaded Q-factor and the frequency-dependent excitation of two degenerative modes (TM01 and TM10) when using a single feed. Many applications which require circular polarization, large bandwidth, and good performance, especially in the field of wireless communication, are still difficult to be designed by using antenna software. Some consideration to take will include the application target and design specification, the materials to be used, and the method to choose (formula, numerical analysis, etc). This paper explains and analyzes the singly-fed microstrip antenna with circular polarization and large bandwidth. This singly-fed type of microstrip antenna provides certain advantage of requiring no external circular polarizer, e.g. the 900 hybrid, as it only needs to apply some perturbation or modification to a patch radiator with a standard geometry. The design of CP and large-bandwidth microstrip antenna is done gradually, by firstly truncating one tip, then truncating the whole three tips, and finally modifying it into a pentagonal patch structure and adding an air-gap to obtain larger bandwidths of impedance, gain and axial ratio. The last one antenna structure results in a novelty because it is a rare design of antenna which includes all types of bandwidth (impedance, gain, and axial ratio) being simultaneously larger than the origin antenna. The resulted characteristic performance of the 1-tip (one-tip) antenna shows respectively 1.9% of impedance bandwidth, 3.1% of gain bandwidth, and 0.45% of axial-ratio bandwidth. For the 3-tip (three-tip) step, the resulted bandwidths of respectively impedance, gain, and axial ratio are 1.7%, 3.3% and 0.5%. The pentagonal structure resulted in the bandwith values of 15.67%, 52.16% and 4.11% respectively for impedance, gain, and axial ratio. 

Reconfigurable circularly polarized capacitive coupled microstrip antenna

2016 ◽  
Vol 9 (4) ◽  
pp. 843-850 ◽  
Author(s):  
Dinesh Kumar Singh ◽  
Binod Kumar Kanaujia ◽  
Santanu Dwari ◽  
Ganga Prasad Pandey ◽  
Sandeep Kumar
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Dual Band ◽  
Single Frequency ◽  
Impedance Bandwidth ◽  
Pin Diode ◽  
Dual Frequency ◽  
Pin Diodes ◽  
Circularly Polarized

The design and measurement of reconfigurable circularly polarized capacitive fed microstrip antenna are presented. Small isosceles right angle triangular sections are removed from diagonally opposite corners for the generation of circular polarization (CP) of axial ratio bandwidth of 11.1%. Horizontal slits of different lengths are inserted at the edges of the truncated patch to provide the dual-band CP and by switching PIN diodes across the slits ON and OFF, reconfigurable circularly polarized antenna is realized. The antenna shows dual-band behavior with reconfigurable CP. In order to enhance the operation bandwidth of the antenna, an inclined slot was embedded on the patch along with PIN diodes across the horizontal slits. This proposed antenna gave an impedance bandwidth of 66.61% (ON state) ranging from 4.42 to 8.80 GHz and 68.42% (OFF state) ranging from 4.12 to 8.91 GHz and exhibits dual-frequency CP with PIN diode in OFF state and single-frequency CP with PIN diode in ON state with good axial ratio bandwidth. The axial ratio bandwidth of 4.42, 2.35, and 2.72% is obtained from the antenna. The antenna has a similar radiation pattern in all the three different CP bands and almost constant gain within the bands of CP operation.

scholarly journals Dual Circularly Polarized Planar Four-Port MIMO Antenna with Wide Axial-Ratio Bandwidth

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5610
Author(s):  
Sachin Kumar ◽  
Gwan Hui Lee ◽  
Dong Hwi Kim ◽  
Hyun Chul Choi ◽  
Kang Wook Kim
Keyword(s):  
Circular Polarization ◽  
Multiple Input Multiple Output ◽  
Vector Current ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Mimo Antenna ◽  
Left Hand ◽  
Input Multiple Output ◽  
Polarization Mechanism

A broadband compact-sized planar four-port multiple-input–multiple-output (MIMO) antenna with polarization diversity is presented. The proposed dual circularly polarized (CP) MIMO antenna consists of four G-shaped monopole elements, two of which are left-hand CP and the other two are right-hand CP. A vertical line strip in the G-shaped radiating element acts in balancing the vertical and horizontal electric field components to obtain 90° phase difference between them for circular polarization. Also, an I-shaped strip is incorporated between the ground planes of the G-shaped antenna elements to obtain equal voltage level in the proposed MIMO configuration. The dual circular polarization mechanism of the proposed MIMO/diversity antenna is analysed from the vector current distributions. The impedance bandwidth (S11 ≤ –10 dB) of the MIMO antenna is 105.9% (4–13 GHz) and the 3 dB axial ratio bandwidth (ARBW) is 67.7% (4.2–8.5 GHz), which is suitable for C-band applications. The overall size of the MIMO antenna is 70 × 68 × 1.6 mm3, and the minimum isolation between the resonating elements is 18 dB. The envelope correlation coefficient is less than 0.25, and the peak gain within the resonating band is 6.4 dBi.

scholarly journals Desain Antena Mikrostrip Segitiga Terpancung Tunggal LHCP Patch Stack sebagai Basic Sensor CP-SAR

2020 ◽  
Vol 1 (2) ◽  
pp. 79-84
Author(s):  
Muhammad Fauzan Edy Purnomo
Keyword(s):  
Synthetic Aperture Radar ◽  
Circular Polarization ◽  
Method Of Moments ◽  
Axial Ratio ◽  
Synthetic Aperture ◽  
Circularly Polarized ◽  
Left Handed ◽  
S Parameter ◽  
Radar Applications ◽  
Aperture Radar

The development of SAR radar technology (Synthetic Aperture Radar) and aircraft as the carrier media is relatively fast and demands the need for communication facilities and infrastructure that have a variety of platforms and high-quality imaging, which can produce processed data with high resolution and good images for all type explored terrain. Based on the demands of the progress of civilization, the antenna placed on the carrier media should have simple, compact, thin, and conformal characteristics. This research will analyze and study the need for a single, low power microstrip antenna in the L-band (1.25 GHz - 1.27 GHz) for CP (Circularly Polarized)-SAR radar applications. The use of Method of Moments (MoM) show that the result of characteristic performance and S-parameter for the single triangular truncated patch stack Left-Handed Circular Polarization (LHCP) antenna, f = 1.25 GHz, are consecutively 7.23 dBic of gain, 0.51 of axial ratio, -16.35 dB of S-parameter. Moreover, the 3-dB axial ratio bandwidth LHCP antenna is around 15 MHz or the percentage around 1.2%                 Perkembangan teknologi radar SAR (Synthetic Aperture Radar) dan pesawat terbang sebagai media pembawanya relatif cepat dan menuntut kebutuhan sarana dan prasarana komunikasi yang memiliki ragam platform dan pencitraan yang berkualitas tinggi, yang mampu menghasilkan data olahan dengan resolusi tinggi dan gambar yang baik untuk segala jenis medan yang dijelajahi. Berdasarkan tuntutan kemajuan peradaban zaman, maka antena yang diletakan pada media pembawa tersebut, seyogyanya memiliki karakteristik sederhana, compact, tipis, dan conformal. Dalam makalah ini akan dianalisis dan dikaji kebutuhan antena mikrostrip tunggal berdaya rendah pada pita L (1,25  GHz - 1,27 GHz) untuk aplikasi radar CP (Circularly Polarized)-SAR. Penggunaan Method of Moments (MoM) menunjukkan bahwa hasil performansi karakteristik dan S-parameter untuk antena segitiga terpancung tunggal Left-Handed Circular Polarization (LHCP)  patch stack, f = 1.25 GHz, berturut-turut yaitu gain sebesar 7.23 dBic, axial ratio sebesar 0.51, dan S-parameter sebesar -16.35 dB. Selain itu, bandwidth axial ratio 3-dB antena LHCP sekitar 15 MHz atau persentasinya sebesar 1,2%.

scholarly journals A SYNCHRONOUS SUB-ARRAY CIRCULARLY POLARIZED MICROSTRIP ANTENNA FOR BISAR ONBOARD UAV

2018 ◽  
Author(s):  
Yohandri
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Array Antenna ◽  
Circularly Polarized ◽  
Left Hand ◽  
Right Hand ◽  
L Band

A circularly polarized microstrip antenna for bi-static SAR onboard UAV has been investigated. The both senseof the circular polarization left-hand circularly polarized (LHCP) and right-hand circularly polarized (RHCP) arecan be achieved on experimental and simulation. The 2x2 sub array antenna operated in 1.176 (L-band) withnovel proximity synchronous feed method has been designed, fabricated, and evaluated to show the characteristic of the antenna. The measured result give the axial ratio bandwidth (&lt;3dB) of about 28 MHz (2%), whichconsistent with the simulated result of about 27 MHz (2%). These results satisfy the specification for our BiSARsystem installed onboard UAV.

A Wideband Polarization Reconfigurable Antenna Array Based on Mode Combination Method

Frequenz ◽  
2019 ◽  
Vol 73 (5-6) ◽  
pp. 153-159
Author(s):  
Zhuo Mu ◽  
Shen-Yun Wang ◽  
Wen-Ying Meng
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Linear Polarization ◽  
Axial Ratio ◽  
Combination Method ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Circularly Polarized ◽  
Left Hand ◽  
Measurement Results

Abstract This paper reports a novel polarization-reconfigurable antenna array based on the theory of mode combination (MC), which can electronically alter its polarization states between left-hand circular polarization (LCP) mode, right-hand circular polarization (RCP) mode, and two combined linear polarization (LP) modes. The array element is adopted as the L-probes fed circularly-polarized antenna reported by Luk et al. [1]. To verify the concept, a prototype of 2×2 antenna array is manufactured and tested. By properly exciting the feeding probes, four polarization modes can be switchable. Measurement results show that the proposed antenna has an overlapped −10 dB impedance bandwidth around 34 % for both CP modes and LP(2) mode, and an overlapped 3 dB axial-ratio bandwidth around 22.0 % of the CP modes. The average realized gains are around 12.4 dB for CP modes and LP(1) mode, which remain stable in the axial-ratio bandwidth.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

Bilayer split-ring chiral metamaterial based reconfigurable antenna for polarization conversion

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Preet Kaur ◽  
Pravin R. Prajapati
Keyword(s):  
Low Cost ◽  
Axial Ratio ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Split Ring ◽  
Circularly Polarized ◽  
Left Hand ◽  
Rectangular Patch ◽  
Mode 2 ◽  
Chiral Metamaterial

Abstract A bilayer split-ring chiral metamaterial converts the linearly polarized wave, into a nearly perfect left or right-handed circularly polarized wave. The proposed antenna is intended to operate at center frequency of 5.80 GHz with switchable polarization capability. The polarization re-configurability is achieved by electronically switching of two PIN-diode pairs, which are embedded into bilayer split-ring Chiral Metamaterial. The optimized length of rectangular patch is 16 mm and width is 12.1 mm. Two types of radiation characteristics offered by the proposed antenna; left hand circularly polarized in mode 1 and right hand circularly polarized in mode 2. Measured results show that its impedance bandwidth is 155 MHz from 5.70 to 5.855 GHz for both mode 1 and mode 2. The measured axial-ratio bandwidth is 100 MHz from 5.75 to 5.85 GHz for mode 1 and 110 MHz from 5.73 to 5.84 GHz for mode 2. Antenna has LHCP gain of 2.52 dBi and RHCP gain of −23 dBi in mode 1. RHCP gain of 2 dBi and polarization purity of about −20 dBi is obtained in mode 2. The proposed antenna has simple structure, low cost and it has potential application in field of wireless communication (i.e., WiMax, WLAN etc.).

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