Micro-coaxial lines for active hybrid-monolithic circuits

Ehsan, Negar; Cullens, Evan; Vanhille, Kenneth; Frey, Dave; Rondineau, S.; Actis, R.; Jessup, Sue; Lender, R.; Immorlica, A.A.; Nair, Deepukumar M.; Filipović, Dejan S.; Popović, Zoya

doi:10.1109/mwsym.2009.5165734

Cited by 14 publications

(3 citation statements)

References 8 publications

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“…This process has gained popularity since its inception for use with microcoaxial lines [27], [28]; however, its versatility and small feature size makes it ideal for use with waveguide above W-band. The structural material is copper, which is grown after a photoresist is deposited to define the waveguide walls.…”

Section: A Fabricationmentioning

confidence: 99%

Micro-Fabricated 130–180 GHz Frequency Scanning Waveguide Arrays

Cullens

Ranzani

Vanhille

et al. 2012

IEEE Trans. Antennas Propagat.

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This paper describes frequency scanning slot arrays operating from 130 to 180 GHz. The arrays are micro-fabricated using the PolyStrata sequential copper deposition process. Measured reflection coefficient and radiation patterns agree with HFSS full-wave simulations. The voltage standing wave ratio is less than 1.75:1 over the entire frequency range, and the measured scanning is 1.04 GHz from 130 to 150 GHz and 32.5 over the full frequency range. The measured gain is 15.5 dBi for a 10-element array at 150 GHz and 18.9 dBi for a 20-element array at 150 GHz with about 3 dB of variation over the scan range.Index Terms-Beam steering, g-band, linear antenna arrays, millimeter wave radar.

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Section: A Fabricationmentioning

confidence: 99%

Micro-Fabricated 130–180 GHz Frequency Scanning Waveguide Arrays

Cullens

Ranzani

Vanhille

et al. 2012

IEEE Trans. Antennas Propagat.

Self Cite

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“…Therefore, the study of broadband Wilkinson power dividers is of great significance at this time. For this purpose, manly wideband power dividers [1]- [6] have been developed so far. But few of them introduce the millimeter-wave wideband Wilkinson power divider.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Broadband Wilkinson Power Divider Using Micro-Strip Branch Lines

Zhou

2023

JCC

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A miniaturized broadband Wilkinson power divider is proposed. Micro-strip branch lines are introduced to replace multiple resistors used in multi-stage Wilkinson power dividers to increase the bandwidth of single-stage Wilkinson power dividers. To demonstrate its performance, an improved single-stage Wilkinson power divider with four micro-strip branch lines was designed. Simulated results show that the insert loss is better than 3.2 dB, the input return loss, output return loss, and isolation are better than 15 dB respectively, across a 76% bandwidth from 18 to 40 GHz.

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“…Another research alternative is to implement the same antenna topology in a more precise manufacturing process, such as wafer level micro-fabrication using equipment and processes used to manufacture semiconductors. It is likely that current state-of-the-art in PCB-based microwave phased arrays, illustrated in Figure 5.2.1, will be superseded by phased arrays based on microfabricated structures as illustrated in [85], (b) a micro-fabricated branchline coupler operating at 60 GHz with groundsignal-ground probe interfaces from [86], (c) a 4-element array operating at 94 GHz using a cavity-backed patch antenna with 4.1% bandwidth and 8.3 dBi gain at 95% efficiency from [87], and (d) a slot array operating from 87 to 102 GHz achieving 14 dB gain at 94 GHz and 30 degree scan angle over a 15 GHz bandwidth from [88]. (All images: © IEEE) Appendices…”

Section: Future Extensionmentioning

confidence: 99%

A Novel Unit Cell Antenna For Highly Integrated Phased Arrays in the SHF Band

Ogilvie¹

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Phased arrays are electromagnetic antenna systems comprised of many radiating elements and processing electronics. Radiating elements are typically positioned in an orderly grid within the antenna aperture. In the receive mode of operation, radiating elements capture some of the signal energy from incoming radiation and guide these signals to processing electronics. Signals are filtered and amplified to maintain the desired sensitivity and complexly weighted using circuits with reconfigurable amplification gain and phase delay. Finally, all signals are combined. The summation of these complexly weighted spatial samples forms a spatial filter in the same way complexly weighted temporal samples establish a temporal filter in a finite impulse response discrete-time filter. Therefore, a phased array behaves like a spatial filter that strongly favors signals arriving from a specific direction. This favored direction represents the look angle of its beam, and the shape of the beam directly relates to the complex weights applied to the signals in the array. Analogous to the flexibility offered by digital filters, phased arrays enable agile beam steering, sidelobe control, and multiple independent beams. These capabilities have revolutionized radar, radioastronomy, and communication systems.Phased arrays have increasingly employed printed circuit board (PCB) fabrication techniques and processes to maximize array channel density, achieve lower profile, and minimize component integration cost. A few applications which leverage these qualities include low-cost radar, mobile satellite communication (SATCOM), and intelligence, surveillance, and reconnaissance (ISR). Further, PCB-based arrays readily accommodate advancements in highly integrated beamforming radio frequency integrated circuits (RFICs), multi-chip modules, and RF micro-electromechanical system (MEMS) device technologies.On a prior effort, an integrated unit cell design was developed for a PCB-based SATCOM array application. However, the design failed to meet the requirements. The primary objective of this work is to demonstrate an improved design using systematic microwave design techniques and modern analysis tools to meet the requirements for the same application. The proposed design must improve gain, bandwidth, size, and manufacturability over the prior design. Additionally, the design must be generally extensible to phased array implementations across the SHF band (3-30 GHz).This work discusses the advantages of phased arrays over continuous apertures (e.g. reflectors), reviews phased array theory, and proposes an improved unit cell design. The proposed design is 35% smaller than a dime and consists of an orthogonally-fed, slot-coupled stacked patch antenna and dual-stage branchline coupler implemented in a multilayer PCB. Within the operating band from 10.7 to 14.5 GHz, the design achieves an average return loss of 15 dB, a uniform radiation pattern with peak realized gain of 4.8 to 7.0 dBic, cross-polarization level below -17 dB, and stable performance i...

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Micro-coaxial lines for active hybrid-monolithic circuits

Cited by 14 publications

References 8 publications

Micro-Fabricated 130–180 GHz Frequency Scanning Waveguide Arrays

Micro-Fabricated 130–180 GHz Frequency Scanning Waveguide Arrays

A Miniaturized Broadband Wilkinson Power Divider Using Micro-Strip Branch Lines

A Novel Unit Cell Antenna For Highly Integrated Phased Arrays in the SHF Band

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