Active feedback microstrip leaky wave antenna-synthesiser design with suppressed back lobe radiation

Shih, Ying-Chou; Chen, Shing-Kwang; Hu, Cheng-Chi; Jou, Christina F.

doi:10.1049/el:19990410

Cited by 11 publications

(8 citation statements)

References 4 publications

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“…One of the approaches reuse the non-radiated power to suppress the reflected power which causes the back lobe [4][5][6]. This method can suppress the back lobe more than 10 dB; however, this method makes the antenna design become more complicated.…”

Section: Introductionmentioning

confidence: 99%

Novel Short Tapered Leaky Wave Antennas With Complementary Split Ring Resonantor for Back Lobe Suppression

Huang¹,

Huang²,

Jou³

2014

PIER

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Abstract-Two novel short tapered leaky wave antenna (LWA) designs with a complementary split ring resonator (CSRR) structure are proposed in this paper. The CSRR structure is positioned at 1/4λ g away from the open-end edge of the LWA. For one of the antenna designs, the CSRR is placed at the ground plane; for the other one, the CSRR is placed on the antenna plane. The reflected wave caused by the open-end edge of the LWA is cancelled by the reflected wave caused by the CSRR, thus, the back lobe can be effectively suppressed. The length of these two short tapered LWAs with CSRR design is only 1.2λ g at 4.3 GHz. According to the measurement results, the impedance bandwidth is 650 MHz for 7 dB return loss, which covers the range from 4.3 GHz to 4.95 GHz. The back lobe can be suppressed effectively about more than 12 dB at the whole operating frequency band. The scanning range of the main beam is about 34 • , which cover the scanning angle from 10 • to 44 • .

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Section: Introductionmentioning

confidence: 99%

Novel Short Tapered Leaky Wave Antennas With Complementary Split Ring Resonantor for Back Lobe Suppression

Huang¹,

Huang²,

Jou³

2014

PIER

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“…Consequently, the reflected wave produces a large back lobe in the opposite direction of main beam. Several researches were studied [4][5][6] to suppress the back lobe. By using an array topology [4] or a taper-loaded antenna end [5] has been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Several researches were studied [4][5][6] to suppress the back lobe. By using an array topology [4] or a taper-loaded antenna end [5] has been developed. Creating a second-radiated path, a two-directional scanned MLWA with aperture-coupled patch antenna arrays has been investigated in Ref.…”

Section: Introductionmentioning

confidence: 99%

A novel short length half‐width microstrip leaky wave antenna with suppressed back lobes

Chiou

Huang

et al. 2009

Micro & Optical Tech Letters

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A novel short half‐width microstrip leaky wave antenna (MLWA) with suppressed back lobes is introduced. The design contains an oblique shape termination and a linked square metal with a grounded via hole. The oblique shape termination changes the direction of the reflected wave, and a linked square metal with a grounded via hole guides the remainder power of the reflected wave to the ground plane. As a result, the large back lobe of the short half‐width MLWA could be suppressed. The measured results show that the proposed design (length of only 1 λ0) improves the back lobes by 9 dB at 4.7 GHz compared with the original half‐width MLWA. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3024–3026, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24805

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“…Although the leakywave antenna has an excellent beam-scanning ability, the serious problem of the leaky-wave antenna lies in structures of huge size and long length. Hence, there has been a lot of research devoted to studying this issue with the hope to reduce the LWA length in order to make the use of LWAs more extensively [1], [5], [6]. In [1], it was mentioned that with a strip of 10.0 cm , the leaky-wave antenna could radiate about 65% of the power.…”

Section: Introductionmentioning

confidence: 99%

“…The reflected power resulting from the mismatch of the open end of the microstrip leaky-wave antenna would cause an undesired interference in the processing of RF microwave signals. According to the recent research, it was understood that the reflected wave could be suppressed by using technologies of longer antenna length [1], or array topology [5], or a taper-loaded antenna end [6]. However, all the proposals mentioned above require large circuit size or complicated structure.…”

Section: Introductionmentioning

confidence: 99%

Studies of suppression of the reflected wave and beam-scanning features of the antenna arrays

Chen

Wang

Guan

et al. 2005

IEEE Trans. Antennas Propagat.

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This paper describes a two-directional linear scanned design by integrating a short leaky-wave antenna (LWA) with aperture-coupled patch antenna arrays. This architecture proposes a technique not only having the advantage of suppressing the backlobe due to the reflected wave in the short LWA but also producing two separate linearly scanned beams, each of them radiating in a different region of space (in both the front side and backside of the LWA). In this design, most of the reflected wave of the short LWA is coupled to the patch antenna arrays on the backside of the substrate. The phase of this coupled signal to each antenna element is adjusted by tuning the individual phase shifter in order to control electronically the patch antenna main beam in the cross plane ( 0). Meanwhile, on the front side, the main beam of the short LWA can be simultaneously scanned in the elevation plane ( 0) by changing the operating frequency. Hence, the two linear beam-scanning radiation patterns of individual direction can be created independently, including a narrow beam in the elevation plane ( plane at 0) at the front side and a broadside beam in the cross plane ( plane at 0) on the backside. The measured results show that the reflected wave of the short LWA in the proposed design is suppressed 8 dB as compared with a traditional short LWA without the aperture-coupled antenna arrays at 10.5 GHz. As a result, this novel architecture provides more flexibility both in the upward elevation plane (H plane) and the downward cross plane (backside-E plane) for possible beam-scanning applications in microwave communications and remote identification.Index Terms-Aperture-coupled patch antenna arrays, phase shifter, reflected wave, varactor diode.

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Active feedback microstrip leaky wave antenna-synthesiser design with suppressed back lobe radiation

Cited by 11 publications

References 4 publications

Novel Short Tapered Leaky Wave Antennas With Complementary Split Ring Resonantor for Back Lobe Suppression

Novel Short Tapered Leaky Wave Antennas With Complementary Split Ring Resonantor for Back Lobe Suppression

A novel short length half‐width microstrip leaky wave antenna with suppressed back lobes

Studies of suppression of the reflected wave and beam-scanning features of the antenna arrays

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