Analysis Performance of Triangle Microstrip Antenna for Basic Construction of Circularly Polarized-Synthetic Aperture Radar Application

Abstract

Graphical abstract AbstractThe development of radar technology, Synthetic Aperture Radar (SAR), Circularly Polarized-Synthetic Aperture Radar (CP-SAR) and geostationary satellite, are demanding needs of communication facilities and infrastructures that have variety platforms, which can generate processed data with high resolution and better image quality for all types of explored terrain. Owing to the antenna embedded on the body of geostationary satellite, its shape should be compact, small, and simple configuration, i.e. the equilateral triangle with and without truncated-tip c1, c2, c3, and c3s antennas using probe and microstrip-line feed with low-power at S-band (2.5 GHz -2.9 GHz). The Method of Moments (MoM) is chosen in the numerical analysis for fast calculation. The performance results for c2 and c3 antennas are almost same, for instance the values of gain and axial ratio (Ar) for each antenna are consecutive of 6.8 dBic and 0.42 dB. Moreover, the performance results for c1, c3, and c3s antennas at the each resonant frequency are relatively different, as follows: c1 antenna operates at the frequency 2.76 GHz, gain RHCP = 6.66 dBic, Ar = 2.91 dB, the operation frequency of c3 antenna is 2.9 GHz, gain LHCP = 6.98 dBic, Ar = 3.02 dB, and for c3s antenna has the operation frequency of 2.5 GHz, gain LHCP = 6.08 dBic, Ar = 1.75 dB. The results for both simulation and measurement of equilateral triangle antenna, especially for Ar bandwidth below 3-dB are about 0.02 GHz and 0.015 GHz, respectively. Furthermore, the results of the 3 dB-Ar beamwidth for simulation and measurement in elevation plane are consecutively about 120° and 80°. AbstrakPerkembangan teknologi radar, SAR, CP-SAR, dan satelit geopegun, menuntut keperluan kemudahan perhubungan dan infrastruktur yang mempunyai pelbagai platform, yang boleh menjana proses data dengan resolusi tinggi dan kualiti imej yang lebih baik untuk semua jenis kawasan terokai. Kerana antena tertanam pada badan satelit geopegun, bentuknya harus padat, kecil, dan konfigurasi mudah, iaitu segi tiga sama sisi dengan c1 dipenggal-tip, c2, c3 dan c3s, dan tanpa dipenggal-tip antena dengan siasatan dan suapan mikrostrip talian menggunakan kuasa rendah dalam S-band (2.5 GHz -2.9 GHz). Kaedah Moments, MoM dipilih dalam analisis berangka banyak cepat. Hasil daripada prestasi bagi antena c2 dan c3 adalah hampir sama iaitu misalnya nilai gain dan Ar untuk setiap antena kali berturut-turut 6.8 dBic dan 0.42 dB. Selain itu, hasil daripada prestasi untuk c1, c3 dan c3s antena di setiap frekuensi salunan agak berbeda, seperti berikut: c1 antena beroperasi di kekerapan 2.76 GHz, mendapat RHCP = 6.66 dBic, Ar = 2.91 dB, operasi frekuensi c3 antena adalah 2.9 GHz, mendapat LHCP = 6.98 dBic, Ar = 3.02 dB, dan untuk antenna c3s mempunyai operasi frekuensi 2.5 GHz, mendapat LHCP = 6.08 dBic, Ar = 1.75 dB. Hasil daripada simulasi dan pengukuran antena segi tiga sama sisi, terutama bagi Ar jalur lebar di bawah 3 dB adalah masing-masing sekitar 0.02 GHz dan 0.015 GHz.Determine the SAR, CP-SAR, and ...

Development of patch stack antenna for CP-SAR sensor

“…In this case, the array antenna uses two patches as a transmitter, Tx, and a receiver, Rx [4,5]. Table 1 shows the specification for the C-Band CP-SAR of aircraft antenna [6]. The Method of Moments (MoM) is chosen in the numerical analysis for fast calculation.…”

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

“…In this case, the array antenna uses four patches as a transmitter, Tx, and a receiver, Rx [10], [11]. Table 1 shows the specification for the C-Band CP-SAR of UAV antenna [12]. The method of moments (MoM) is chosen in the numerical analysis for fast calculation.…”

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

“…In this case, the array antennas use the two patches as a transmitter, Tx, and receiver, Rx [7], [8]. Table 1 shows the specification for CP-SAR system, which influence the specification of the L-Band CP-SAR airspace antenna [9].…”

“…As well, the function of t serve as switching to change the variation of polarization, if the proximity coupled feed is located on the same place (for example, the proximity coupled feed locus in the right side, t < h, RHCP will be achieved on that place). If t = h, then both of the antennas do not have CP and only obtain a linear polarization [9]. Figure 1.…”