A Sequential-Phase Feed Using a Circularly Polarized Shorted Loop Structure

Li, Yue; Zhang, Zhijun; Feng, Zhao

doi:10.1109/tap.2012.2227103

Cited by 102 publications

(67 citation statements)

References 16 publications

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“…Accordingly, gain requirement of real-case communication systems is satisfied. The recorded gain value is a bit smaller than the recorded values in [12][13][14][15][16][17]. It is worth noting that higher gains are obtained via larger array structures with limited impedance bandwidth and narrower AR.…”

Section: Comparative Studies: the Proposed Design Versus The Archivedmentioning

confidence: 67%

“…3. As this table unveils, the array size in [12][13][14][15][16] is larger than the proposed SAA. This is while; 10-dB impedance bandwidth and 3-dB AR bandwidths are narrower which reveals a performance defect against the larger implementation space.…”

Section: Comparative Studies: the Proposed Design Versus The Archivedmentioning

confidence: 84%

“…To this end, the established 2 × 2 structure is tailored against the recently published 2 × 2 designs [12][13][14][15][16][17]. The comparison is conducted in terms of 10-dB impedance bandwidth, 3-dB AR bandwidth, and the total size of the array antenna.…”

Section: Comparative Studies: the Proposed Design Versus The Archivedmentioning

confidence: 99%

See 2 more Smart Citations

A Compact Array Antenna: Explicit Design for C and X Band Applications

Mohammadi-Asl¹,

Nourinia²,

Ghobadi³

et al. 2017

RADIOENGINEERING

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show abstract

Section: Comparative Studies: the Proposed Design Versus The Archivedmentioning

confidence: 67%

Section: Comparative Studies: the Proposed Design Versus The Archivedmentioning

confidence: 84%

See 1 more Smart Citation

A Compact Array Antenna: Explicit Design for C and X Band Applications

Mohammadi-Asl¹,

Nourinia²,

Ghobadi³

et al. 2017

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…Figure 1(a). The disc operates in modal degeneration, with the ellipse serving as the degeneration driver, splitting the fundamental TM 11 mode of the disc into two detuned ones, TM 11 and TM y , due to the differently forced current paths. Qualitatively, the modes behave as TM 11 of the unperturbed disk, radiating linearly polarized (LP) orthogonal far-fields, as depicted in Figure 1(b) and Figure 1(c).…”

Section: Introductionmentioning

confidence: 99%

A Circularly Polarized Antenna Array With a Convenient Bandwidth/Size Ratio Based on Non-Identical Disc Elements

Maddio¹

2015

PIER Letters

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Abstract-This paper presents the design and development of a circularly polarized microstrip antenna array for C-band application. The proposed antenna has a convenient trade-off between bandwidth and dimension. The array design is based on the sequential phase arrangement (SPA) of 2 × 2 non-identical disc-based patch elements, operating in modal degeneration. Exploiting the properties of the SPA, capable of forcing CP even when operating on linear polarized elements, each disc is independently detuned to operate on non-perfectly overlapping bands. When properly fed by a sequential phase network (SPN), the set of four discs seamlessly covers the wide cumulative bandwidth which is the combination of the four sub-channels. To verify the design, a single-layer via-less array was fabricated in a compact printed square board of side 40 mm, meaning a surface of 0.64λ 2 0 at the center frequency of 6.0 GHz, assembling the elements with a compact space-filling SPN. Measurements show a wide 10 dB return loss bandwidth of 28.5%, a 3 dB axial ratio (AR) bandwidth exceeding 1 GHz, and a realized gain ranging from 4.1 dB to 7.25 dB inside the AR bandwidth. The global bandwidth of the proposed array, almost coincident with the AR bandwidth, is 17.0%.

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“…Various effective techniques used to expand the CP bandwidth of slot antennas have been introduced as follows: inserting inverted-L or T-shaped grounded strips in the slot [7][8][9][10]13], embedding a lighting-shaped feed line [9], implanting a spiral slot in ground plane [11], and employing arc-shaped grounded metallic strips [12]. And the sequential rotation technique has been generally used to improve the bandwidth performance of CP arrays [1,5,[13][14][15]. Through proper sequential rotation with the excitation of sequential phases, the CP antenna array can achieve a remarkable CP bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Broadband Circularly Polarized Slot Antenna Array With Fan-Shaped Feed Line and L-Shaped Grounded Strips

Yan²,

Zhang³

et al. 2014

PIER Letters

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Abstract-A broadband circularly polarized (CP) slot antenna array fed by a coplanar waveguide (CPW) is proposed. A fan-shaped feed line and three L-shaped grounded strips are embedded in the square slot antenna element to enlarge the bandwidth. Simulated results show that the antenna element can obtain a wide impedance bandwidth with −10 dB reflection coefficient covering 1.7-6.3 GHz (about 115% relative bandwidth) and 3 dB axial ratio (AR) bandwidth covering 2.6-5.2 GHz (about 66%). Using four elements with sequential phase feed, the measured impedance bandwidth and axial ratio bandwidth of the antenna array can be enhanced to 105% (1.65-5.35 GHz) and 71.3% (2.3-4.85 GHz), respectively. Good radiation characteristics with the peak gain of 10.8 dBic over the operating band can be obtained.

show abstract

A Sequential-Phase Feed Using a Circularly Polarized Shorted Loop Structure

Cited by 102 publications

References 16 publications

A Compact Array Antenna: Explicit Design for C and X Band Applications

A Compact Array Antenna: Explicit Design for C and X Band Applications

A Circularly Polarized Antenna Array With a Convenient Bandwidth/Size Ratio Based on Non-Identical Disc Elements

Broadband Circularly Polarized Slot Antenna Array With Fan-Shaped Feed Line and L-Shaped Grounded Strips

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