Novel Dual Circularly Polarized Radiating Element for Spherical Phased-Array Application

Kumar, Chandrakanta; Srinivasan, V. V.; Lakshmeesha, V. K.; Pal, Surendra

doi:10.1109/lawp.2009.2026192

Cited by 34 publications

(14 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To cancel the coupled electromagnetic components at the output and improve the isolation between the two ports, the phase delays of the two transmission paths should be reversed at the junction of the output,        2 1 total total (7) This equation can be realized by adjusting the length of the neutralization line. Fig.…”

Section: Isolation Improvementmentioning

confidence: 99%

See 1 more Smart Citation

Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

Mao

Gao

Wang

et al. 2017

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Abstract-This paper presents a novel method of designing the compact dual-sense circularly-polarized (CP) microstrip antenna/array with improved impedance bandwidth, axial ratio (AR) bandwidth and inter-polarization isolation. The left-hand and right-hand CP (LHCP/ RHCP) characteristics are achieved simultaneously by conceiving a vertically coupled resonant structure for the first time. Different from traditional methods, the antenna shows a compact size but exhibits the wide impedance and 3-dB AR bandwidths. For each input, two coupling paths are purposely designed to excite the TM10 and TM01-mode of the patch, respectively. By composing different coupling units in the two paths, an intrinsic ±90 o phase difference over a broadband can be obtained, resulting in the broadband CP characteristics. In addition, a novel method of using the neutralization line between the two feeds is investigated to improve the isolation between the polarizations. Based on the dual-sense CP element, a 1 × 4 dual-sense CP array is composed to exemplify its potential applications in large arrays. Compared with traditional CP antennas, the proposed antennas have the advantages of compact size, simplified feed, broad impedance and 3-dB AR bandwidths, and improved isolation. Experimental results verify the predictions.

show abstract

Section: Isolation Improvementmentioning

confidence: 99%

“…However, it has the problems of large volume, heavy weight and high profile. In [7]- [9], dual CP antennas were achieved using the waveguides. Similarly, these antennas have the disadvantages such as bulky structure, high weight, and difficulty for integration.…”

mentioning

confidence: 99%

Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

Mao

Gao

Wang

et al. 2017

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…Square waveguide polarizers had been popular afterwards till 1991 when the first circular waveguide polarizer with a stepped septum was made (Behe & Brachat 1991). Circular waveguide polarizers have the advantage that the interface to the front-end feed horn is natural without the need of a transformer, and have since been widely used in antenna arrays (Kumar et al 2009;Franco 2011;Galuscak et al 2012).…”

Section: Septum Polarizermentioning

confidence: 99%

A 77-118 GHz resonance-free Septum polarizer

2014

View full text Add to dashboard Cite

Challenging the conventional bandwidth limit, we design an extremely wide-band circular waveguide septum polarizer, covering 42% bandwidth, from 77 GHz to 118 GHz, without any high-order resonance. The performance of this polarizer has been verified in between 75 GHz and 115 GHz. The Stokes parameters constructed from the measured data show that the leakages from I to Q are below ±2% and the Q U mutual leakage below ±1%. This result removes the major weakness of the septum polarizer and opens up a new domain of astronomical instrumentation for polarization measurement. Despite this polarizer is designed to cover 77-118 GHz, it can be straightforwardly downsized to cover higher frequencies with minor change. The measurement result of a G-band (140-220 GHz) polarizer is also presented.

show abstract

“…3. Details of the design of this element are reported in [6]. This element maintains about 28 dB cross polarized isolation over the band of operation.…”

Section: Practical Implementations and Hardwarementioning

confidence: 99%

“…Because it is difficult to achieve very high polarization purity over the entire band of operation and it is quite evident from a search over the open literatures. Recently in [6] a high performance circularly polarized radiating element suitable for frequency reuse operation has been reported by the same group. This element has better than 28 dB cross polarized isolation over the frequency band.…”

Section: Introductionmentioning

confidence: 99%

Design considerations for dual circularly polarized spherical phased array antenna at X-band for spacecraft data transmission

Srinivasan

Kumar

Brajesh

et al. 2011

2011 IEEE Applied Electromagnetics Conference (AEMC)

Self Cite

View full text Add to dashboard Cite

In this paper, design of a dual circularly polarized (CP) spherical phased array antenna (PAA) is discussed. Dual CP configuration is implemented to enable frequency reuse using polarization diversity. This is realized using a high performance dual CP radiating element. This antenna is capable to generate beams in both the polarizations at any specified direction over the hemisphere. Realization aspects and the measured results of the PAA are discussed here. This antenna is proposed to be used for the high bit-rate data transmission at X-band from the India's upcoming RADAR imaging satellite RISAT-1.

show abstract

Novel Dual Circularly Polarized Radiating Element for Spherical Phased-Array Application

Cited by 34 publications

References 12 publications

Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

A 77-118 GHz resonance-free Septum polarizer

Design considerations for dual circularly polarized spherical phased array antenna at X-band for spacecraft data transmission

Contact Info

Product

Resources

About