scholarly journals Design of a Two-Element Antenna Array Using Substrate Integrated Waveguide Technique

2011 ◽  
Vol 2011 ◽  
pp. 1-7
Author(s):  
Kheireddine Sellal ◽  
Larbi Talbi
Keyword(s):  
Antenna Array ◽  
Phase Shifter ◽  
Phased Array ◽  
Phase Shifting ◽  
Experimental Measurements ◽  
Substrate Integrated Waveguide ◽  
Slot Antennas ◽  
Theory And Experiments ◽  
Better Than ◽  
Good Agreement

The design of a two-element antenna array using the substrate integrated waveguide (SIW) technique and operating at 10 GHz is presented. The proposed antenna array consists of two SIW phase shifter sections with two SIW slot antennas. The phase shifting is achieved by changing the position of two inductive posts inserted inside each element of the array. Numerical simulations and experimental measurements have been carried out for three differential phases between the two antenna array elements, namely, 0°, 22.5°, and 67.5°. A prototype for each differential phase has been fabricated and measured. Results have shown a fairly good agreement between theory and experiments. In fact, a reflection coefficient of better than 20 dB has been achieved around 10 GHZ. The E-plane radiation pattern has shown a beam scan between 5° and 18° and demonstrated the feasibility of designing an SIW antenna phased array.

Application of Ferroelectrics in Low-Cost Microwave Phased-Array Antennas

2002 ◽  
Vol 720 ◽  
Author(s):  
J. B. L. Rao ◽  
D. P. Patel ◽  
P. K. Park ◽  
T. K. Dougherty ◽  
J. A. Zelik ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Phased Array ◽  
Low Cost ◽  
Bulk Phase ◽  
Phase Shifting ◽  
Phased Array Antenna ◽  
Beam Scanning ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Radiating Element

AbstractA novel, low-cost, phased-array antenna that uniquely incorporates bulk phase shifting using voltage-tunable dielectric (VTD) material is presented. The array does not contain an individual phase shifter at each radiating element. This paper presents the antenna concept and describes how it can be used as a low-cost phased array. The VTDs that are used in this antenna are described. The measured antenna patterns of a prototype phased array demonstrating electronic beam scanning at 10 GHz are also presented.

Reconfigurable Phased-Array Antenna Using Continuously Tunable Substrate Integrated Waveguide Phase Shifter

2019 ◽  
Vol 67 (11) ◽  
pp. 6894-6908 ◽  
Author(s):  
Yuan Ji ◽  
Lei Ge ◽  
Jianpeng Wang ◽  
Quangang Chen ◽  
Wen Wu ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Phased Array ◽  
Array Antenna ◽  
Substrate Integrated Waveguide ◽  
Phased Array Antenna

Broadband Transition between Rectangular Waveguide and Substrate Integrated Waveguide Based on Double Rhombus Antenna Probe

2014 ◽  
Vol 668-669 ◽  
pp. 799-802
Author(s):  
Hai Yan Jin ◽  
Teng Yue
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Substrate Integrated Waveguide ◽  
Metal Waveguide ◽  
Low Insertion Loss ◽  
Better Than ◽  
Good Agreement

The paper presents a design of rectangular waveguide-SIW transition, which provides a broadband and low insertion loss performance. The broadband transition is realized by using double-rhombus antenna probe inserted into rectangular metal waveguide. The transition is simulated and measured at 9-20GHz. The measured results show that a good agreement with simulation and an insertion loss less than 2.8 dB and a return loss better than 10 dB are obtained at 10–18.5 GHz for a back-to-back structure.

scholarly journals Bandwidth Enhancement of Substrate Integrated Waveguide Cavity-backed Bow-tie-complementary-ring-slot Antenna using a Shorted-via

2018 ◽  
Vol 68 (2) ◽  
pp. 197 ◽  
Author(s):  
Arvind Kumar ◽  
S. Raghavan
Keyword(s):  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Substrate Integrated Waveguide ◽  
Radiation Characteristics ◽  
New Approach ◽  
Bandwidth Enhancement ◽  
The Individual ◽  
Better Than ◽  
Bow Tie ◽  
Good Agreement

In this study, a planar cavity-backed bow-tie-complementary-ring-slot antenna is proposed, and a new approach for bandwidth enhancement using a shorted-via is introduced. A shorted-via concept overcomes the narrow impedance bandwidth of a conventional substrate integrated waveguide cavity-backed antenna. By adjusting the location of the shorted-via (placed just above the centroid of the radiating slot), the individual bandwidth of the lower and higher order resonances has been tuned below -10 dB criterion, which results in the broadening of the bandwidth. Finally, the antenna is proficient to operate for an impedance bandwidth of 15.71 per cent, ranging from 12.02~14.07 GHz. The proposed antenna shows a gain of better than 4 dBi within the operating band with less than 0.5 dBi variation. Moreover, the antenna preserves good radiation characteristics, which is similar to that of the conventional metallic counterpart. To validate the simulated results, an antenna is fabricated and tested. The simulated results in terms of the reflection coefficient, gain, and radiation patterns are in good agreement with the measured results.

scholarly journals Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band

2019 ◽  
Vol 9 (23) ◽  
pp. 5229
Author(s):  
Mohamed T. ElKhorassani ◽  
Angel Palomares-Caballero ◽  
Antonio Alex-Amor ◽  
Cleofás Segura-Gómez ◽  
Pablo Escobedo ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Dynamic Range ◽  
Phase Shifting ◽  
Final Phase ◽  
Hybrid Coupler ◽  
Electronically Tunable ◽  
Electronically Controllable ◽  
Good Agreement ◽  
K Band

This communication presents the design of a two-port electronically tunable phase shifter at K band. The phase shifter consists of a 3 dB hybrid coupler loaded with reflective phase-controllable circuits. The reflective circuits are formed by varactors and non-sequential impedance transformers which increase the operational bandwidth and the provided phase shift. The final phase shifter design is formed by two loaded-coupler stages of phase shifting to guarantee a complete phase turn. An 18 GHz phase shifter design with dynamic range of 600 degrees of phase shift is depicted in this document. The prototype is manufactured and validated through measurements showing good agreement with the simulation results.

Measurement and Comparison of Airflow in Condenser Axial-Flow Fans With Aluminum and Fiberglass Blades

2008 ◽  
Author(s):  
N. Hosseini ◽  
M. H. Raad ◽  
M. Moghiman
Keyword(s):  
Experimental Investigation ◽  
Axial Flow ◽  
Physical Characteristics ◽  
Tip Clearance ◽  
Experimental Measurements ◽  
Airflow Rate ◽  
Air Velocity ◽  
Measurement Results ◽  
Better Than ◽  
Good Agreement

This paper presents an experimental investigation of effects of physical characteristics of blades on the airflow rate of an axial-flow fan. Two types of fiberglass and aluminum blades have been compared. The comparison includes air velocity, air flow and physical characteristics; like airfoil design, twist, tip clearance and chord variation. Pitot tube has been used as the most compatible device for airflow measurement. Results show that aluminum blades have performed better than fiberglass blades and the comparison of experimental measurements against calculated results, regarding fan laws, shows good agreement.

Ka-Band Passive Phased-Array Antenna With Substrate Integrated Waveguide Tunable Phase Shifter

2020 ◽  
Vol 68 (8) ◽  
pp. 6039-6048
Author(s):  
Zahra Rahimian Omam ◽  
Wael M. Abdel-Wahab ◽  
Amir Raeesi ◽  
Ardeshir Palizban ◽  
Ali Pourziad ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Phased Array ◽  
Array Antenna ◽  
Substrate Integrated Waveguide ◽  
Phased Array Antenna ◽  
Ka Band

scholarly journals SIW Cavity-Backed Antenna Array Based on Double Slots for mmWave Communications

2021 ◽  
Vol 11 (11) ◽  
pp. 4824
Author(s):  
Bilal Hammu-Mohamed ◽  
Ángel Palomares-Caballero ◽  
Cleofás Segura-Gómez ◽  
Francisco G. Ruiz ◽  
Pablo Padilla
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Frequency Band ◽  
Wave Frequency ◽  
Antenna Design ◽  
Operating Frequency ◽  
Substrate Integrated Waveguide ◽  
Proof Of Concept ◽  
Operating Frequency Band ◽  
Good Agreement

This paper presents a cavity-backed antenna array in substrate integrated waveguide (SIW) technology in the millimeter-wave frequency band. The proposed antenna design uses double slots as radiating elements instead of conventional single slots. The double slots allow better control in the design of the operating frequency bands of the cavity-backed antenna. The performance of the cavity-backed antennas with single and double slots is compared to assess the enhanced behavior of the double slots. As a proof of concept, a 2 × 2 array of cavity-backed antennas is designed, manufactured, and measured. Each cavity-backed antenna contains 2 × 2 double slots; thus, a 4 × 4 antenna array is considered. The experimental operating frequency band of the proposed antenna array ranges from 35.4 to 37 GHz. There is a good agreement between the simulated and measured results. The measured gain is around 17 dBi in the whole operating frequency band with a 75% total antenna efficiency.

Wideband isolation-improved substrate-integrated waveguide power dividers/combiners

2018 ◽  
Vol 10 (9) ◽  
pp. 1019-1027
Author(s):  
Yong Mao Huang ◽  
Haiyan Jin ◽  
Yuliang Zhou ◽  
Supeng Leng ◽  
Maurizio Bozzi
Keyword(s):  
Insertion Loss ◽  
The Other ◽  
Power Divider ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Balance Performance ◽  
Power Dividers ◽  
Lumped Resistors ◽  
Better Than ◽  
Good Agreement

AbstractIn this paper, a 3 dB H-plane substrate-integrated waveguide (SIW) power divider/combiner with improved isolation is reported. By adding two isolated ports into the Y-junction, it will perform like a multi-port coupler, so that the isolation between its dividing ports can be effectively improved as the newly-added ports are properly matched. To verify the availability and effectiveness of this concept, two prototypes, one is terminated by coaxial terminations and the other is loaded with lumped resistors, are developed. Their measured results are separately in good agreement with their corresponding simulations. Meanwhile, isolations better than 16 dB with fractional bandwidth (FBW) of 35 and 25% are achieved, respectively, as well as low phase and amplitude imbalances. Compared with some reported similar SIW power dividers, the proposed ones exhibit wider FBW with similar isolation, insertion loss, phase, and amplitude balance performance.

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