Side-Lobe Level Reduction of Half-Mode Substrate Integrated Waveguide Leaky-Wave Antenna

Javanbakht, Nima; Amaya, Rony E.; Shaker, J.; Syrett, Barry

doi:10.1109/tap.2020.3037806

Cited by 23 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the SLL of our proposed antenna is not optimum, it is better than the reported ones in [3], [44], and [58]. The SLL can be reduced by tapering the side via fence [46], [47] or the open side aperture [48], [49], which is the subject of ongoing research. Realizing the proposed design on a thicker substrate can improve the gain by reducing the conductor loss and improving the impedance matching.…”

Section: Simulated and Measured Resultsmentioning

confidence: 94%

“…The presence of multiple nodes in the field distribution confirms the excitation of the higher-order mode. Whereas in a narrow HMSIW supporting only the fundamental mode, the maximums of the E-field are solely at the open side aperture [48]. The circular cells are placed at the locations of the maximum electric field to perturb the field and change the modal configuration more effectively, as shown in Fig.…”

Section: (B)mentioning

confidence: 99%

See 1 more Smart Citation

Fixed Frequency Beam-Scanning HMSIW-Based Leaky-Wave Antenna Composed of Circular Slots in V-Shape Configuration

et al. 2021

Self Cite

View full text Add to dashboard Cite

A new reconfigurable slotted antenna is presented in this manuscript. The proposed antenna is realized on a half-mode substrate integrated waveguide (HMSIW). The beam-steering is achieved using embedded varactor diodes in circular cells. Sweeping the bias voltage causes variations of the phase constant, which leads to the fixed frequency beam-scanning. Each reconfigurable cell includes a circular slot at the top plate and varactor switch, DC block, and RF block at the backside of the structure. The operating frequency is chosen as 28.5 GHz in the support of the upcoming 5G mm-wave communications systems. The proposed antenna beam scans 29° of space by switching among different states at 28.5 GHz. The length, width, and height of the antenna are 67 mm, 48 mm, and 0.32 mm, respectively. The proposed antenna's main novelties are compactness and electronic beam-scanning capability using a single switch per cell. The measured peak realized gain and sidelobe level (SLL) at 28.5 GHz are 8.2 ± 0.6 dBi and 5 dB, respectively. While the impedance bandwidth of the proposed antenna is 1.5 GHz. A good agreement between measured and simulated results is observed. The discrepancies are investigated through a sensitivity analysis. Fixed frequency beamscanning capability, compactness, simplicity of the assembly, backward radiation, and slight gain variation of the proposed antenna make it a suitable candidate for blind-spot monitoring and 5G vehicle to everything (V2X) communications.INDEX TERMS antenna, beam-scanning, compact, leaky-wave, varactor diode.

show abstract

Section: Simulated and Measured Resultsmentioning

confidence: 94%

Section: (B)mentioning

confidence: 99%

Fixed Frequency Beam-Scanning HMSIW-Based Leaky-Wave Antenna Composed of Circular Slots in V-Shape Configuration

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…LWA is a traveling wave antenna in which the wave leaks into space through the discontinuities 8‐38 . LWAs are categorized into uniform, 13‐18 quasi‐uniform, 19‐24 and periodic 25‐29 Uniform LWA has a uniform cross‐section containing a single long slot. While quasi‐uniform and periodic LWAs have periodic cross‐sections and radiation occurs from the periodic slots on the surface of the antenna.…”

Section: Introductionmentioning

confidence: 99%

A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

Javanbakht

Amaya

Shaker³

et al. 2021

Int J RF Microw Comput Aided Eng

Self Cite

View full text Add to dashboard Cite

A novel method for confining the undesired radiation of the feed transition of a low‐profile leaky‐wave antenna (LWA) is demonstrated in this paper. The proposed design method uses novel tapered CPW transitions resulting in variation of the parasitic capacitance and electrical length of the feed. This leads to the reduction of the side‐lobe level (SLL), which is dictated by the feed and the slotted sections of the antenna. The undesired radiation from the feed becomes crucial in the low‐profile antenna in which the surface‐mounted connector along feed transition is the only practical feeding mechanism. The key novelty of the proposed approach is the reduction of SLL by exclusively modifying the feed structure rather than the slotted radiation section. To validate the proposed approach, a modified compact feeding mechanism for LWA is designed. The antenna is realized based on the substrate integrated waveguide (SIW). The antenna's length, width, and height are 110 mm, 31 mm, and 0.5 mm, respectively. The operating frequency band was chosen as 26 to 30 GHz, covering an allocated 5G band. The measured peak realized gain and SLL are 6.1 dBi and − 11.4 dB, respectively. An improvement of 5.7 dB in SLL compared to the conventional LWA was observed. The simple fabrication process and efficiency of the proposed method make it a viable approach for reducing the SLL of the low‐profile antennas. Compactness, low SLL, and proper gain of the reported antenna make it a suitable candidate for 5G vehicle to everything (V2X) communications and mm‐wave navigation systems.

show abstract

“…Hence, it is more compact than SIW. In the HMSIW LWA, the propagating wave leaks into space through the aperture [10]- [15] and the slots on the top cladding [16]. Generally, HMSIW has a high sidelobe level (SLL) that is mainly due to the small size of the ground plane and reflection from the structure.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, HMSIW has a high sidelobe level (SLL) that is mainly due to the small size of the ground plane and reflection from the structure. Tapering the via fence [13], [14] and the aperture [15] are among the methods for improving the radiation characteristics such as SLL, beamsquint, and gain. The side aperture can be modelled as a long uniform slot.…”

Section: Introductionmentioning

confidence: 99%

A Compact Cavity-Based Leaky-Wave Antenna in a Low Temperature Co-Fired Ceramic Process With Improved Performance

et al. 2021

Self Cite

View full text Add to dashboard Cite

An approach for improving the gain of the leaky-wave antenna (LWA) is presented in this paper. Embedding cavities in the structure leads to gain improvement. To validate the proposed method, it was implemented on a half-mode substrate integrated waveguide (HMSIW) LWA. The proposed HMSIW LWA was realized on a low temperature co-fired ceramic (LTCC) structure to achieve a compact structure. The key novelty of the proposed antenna is the gain improvement by using embedded cavities without increasing the antenna size. Applying the novel design method results in a measured peak realized gain of 7.6 dBi. Tapering the aperture leads to about 6 dB reduction of sidelobe level (SLL) in the upper hemisphere as well. The impedance matching frequency bandwidth of the antenna ranges from 28.3 to 29 GHz that falls within the 5G mm-wave frequency bands. The length, width, and thickness of the antenna are 40 mm, 16 mm, and 1 mm, respectively. The compactness, medium gain, and low loss of the proposed antenna make it a suitable candidate for 5G wireless devices. A good agreement between the measured and simulated results is observed. INDEX TERMS antenna, cavity, compact, gain, leaky-wave.

show abstract

Side-Lobe Level Reduction of Half-Mode Substrate Integrated Waveguide Leaky-Wave Antenna

Cited by 23 publications

References 19 publications

Fixed Frequency Beam-Scanning HMSIW-Based Leaky-Wave Antenna Composed of Circular Slots in V-Shape Configuration

Fixed Frequency Beam-Scanning HMSIW-Based Leaky-Wave Antenna Composed of Circular Slots in V-Shape Configuration

A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

A Compact Cavity-Based Leaky-Wave Antenna in a Low Temperature Co-Fired Ceramic Process With Improved Performance

Contact Info

Product

Resources

About