Micromachined millimeter-wave Butler matrix with a patch antenna array

Murad, Noor Asniza; Lancaster, M.J.; Wang, Yi; Ke, Maolong

doi:10.1109/mms.2009.5409809

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The gain of the slotted antenna can be considered as a gain of an antenna array, so when it doubles the number of element, the gain doubled. Therefore, to find the gain and the beam width of the slotted antenna the following equations are applied [14][15]:…”

Section: Telkomnikamentioning

confidence: 99%

Bi-directional Beams Waveguide Slotted Antenna at Millimeter Wave

2018

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This paper focused on designing a bi-directional beams waveguide slotted antenna at millimetre wave spectrum. Waveguide slotted antenna is known for its highly directional pattern. By having bidirectional pattern, the capacity of system coverage can be expanded. The design is implemented by using antenna slot theory on a waveguide structure. The slotted are made on two wall surfaces and the performance is compared to the slotted on single wall. The two models designs are simulated using Computer Simulation Technology (CST) microwave software. The simulation results show that both models operate at 30 GHz with minimum reflection coefficient of -24.63 and -25.01 dB respectively. The two models achieved a fair high gain at 15.5 dB and 13.3 dB with directional beamwidth of 8.9 degree. The proposed bi-directional beams structure achieved a comparable gain in both directions when compared to the single direction.

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Section: Telkomnikamentioning

confidence: 99%

Bi-directional Beams Waveguide Slotted Antenna at Millimeter Wave

2018

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“…SU-8 is capable of constructing threedimensional terahertz waveguide structures with high aspect ratios (greater than 20 : 1), high-dimensional accuracy (tolerance within a few microns), and excellent surface integrity (roughness on the order of tens of nanometres) [24]. The SU-8 process has been utilised to demonstrate a range of millimetre wave and terahertz circuits, including filters [21,[25][26][27][28], waveguides [29,30], Butler matrix with a patch antenna array [31], an orthomode transducer [32], and antennas [33][34][35].…”

Section: Su-8 Micromachiningmentioning

confidence: 99%

Submillimeter‐wave waveguide filters fabricated by SU‐8 process and laser micromachining

Shang

Yang

Glynn

et al. 2017

IET Microwaves, Antennas & Propagation

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For terahertz systems, rectangular waveguide is an ideal low loss medium for interconnectivity and the construction of passive circuits. A drawback when manufacturing waveguides at submillimeter wavelengths is the demanding tolerances due to small dimensions. For example a WR-3 waveguide (operating between 220 and 325 GHz) has a cross-sectional dimension of just 864 by 432 µm, and higher frequency waveguides get proportionally smaller. An additional challenge is that if using waveguide for passive circuits such as filters, there are additional structures inside the waveguide which are significantly smaller than the waveguide itself. Traditionally, computer numerical control (CNC) milling has been used for waveguides, however at terahertz frequencies this is difficult to utilise. In this paper emerging technologies for terahertz waveguides are compared with conventional CNC solutions. The technologies include the photolithography based polymer etching of waveguides using SU-8 photoresist, and the laser machining of metal. Both have shown promise, and good quality terahertz passive components have been fabricated and measured.

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“…As a demonstration, a 38 GHz antenna is designed. This technique is applicable for much higher frequency patches [7] and waveguide based antennas that are under development. Micromachining enables high dimensional accuracy of the patches.…”

Section: Introductionmentioning

confidence: 99%

Micromachined air‐filled patch antennas for millimeter‐wave applications

Wang¹,

Ke²,

Lancaster³

2010

Micro & Optical Tech Letters

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Air‐filled patch antennas for millimeter‐wave (mm‐wave) applications are demonstrated using silicon‐based micromachining techniques. The antennas are fed by rectangular coaxial lines and made of five gold plated layers bonded together. Each layer is made by deep reactive etching on silicon. The patches are suspended by stubs, without using any dielectric materials. The dielectric free structure not only avoids dielectric losses but also eliminates spurious surface modes that often trouble substrate supported patch antennas at mm‐wave frequencies. The predicted gain of the patch is as high as 9.4 dBi with a patch dimension of 3.27 mm by 3.54 mm at 38 GHz. A radiation pattern measurement has been performed and results shown. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1345–1347, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25183

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Micromachined millimeter-wave Butler matrix with a patch antenna array

Cited by 6 publications

References 10 publications

Bi-directional Beams Waveguide Slotted Antenna at Millimeter Wave

Bi-directional Beams Waveguide Slotted Antenna at Millimeter Wave

Submillimeter‐wave waveguide filters fabricated by SU‐8 process and laser micromachining

Micromachined air‐filled patch antennas for millimeter‐wave applications

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