Microcoaxial Interconnects for Signals, Bias, and Supply of MMICs

Torres, Daniela A.; Kopa, Anthony; Meinhold, Mitch; Lewis, Peter H.; Delisio, Jeff; Gray, Caprice

doi:10.1109/mwsym.2019.8701017

Cited by 3 publications

(2 citation statements)

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“…An important engineering task is to efficiently transfer (i.e., "focus") microwaves in coaxial cables with mm-scale TEM field modes into the 54 µm-wide microstrips. Areas of current interest are the design and simulation of tapered connectors, tapered coplanar waveguides, and micro-coaxial cables [28].…”

Section: Discussionmentioning

confidence: 99%

Microwave Atom Chip Design

Miyahira

Rotunno

et al. 2021

Atoms

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We present a toolbox of microstrip building blocks for microwave atom chips geared towards trapped atom interferometry. Transverse trapping potentials based on the AC Zeeman (ACZ) effect can be formed from the combined microwave magnetic near fields of a pair or a triplet of parallel microstrip transmission lines. Axial confinement can be provided by a microwave lattice (standing wave) along the microstrip traces. Microwave fields provide additional parameters for dynamically adjusting ACZ potentials: detuning of the applied frequency to select atomic transitions and local polarization controlled by the relative phase in multiple microwave currents. Multiple ACZ traps and potentials, operating at different frequencies, can be targeted to different spin states simultaneously, thus enabling spin-specific manipulation of atoms and spin-dependent trapped atom interferometry.

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Section: Discussionmentioning

confidence: 99%

Microwave Atom Chip Design

Miyahira

Rotunno

et al. 2021

Atoms

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“…For 26 GHz 5G band and E band, several LWAs based upon low-permittivity substrates have been hybrid integrated with InP photodiodes using wire bonding [31][32][33]. However, at THz frequencies, wire bonding will lead to high losses [34,35]. Therefore, we here propose the use of a THz LWAs based upon InP substrate for future monolithic and low-loss integration with THz photodiodes.…”

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confidence: 99%

InP-Based THz Beam Steering Leaky-Wave Antenna

Lü

Haddad

Sievert

et al. 2021

IEEE Trans. THz Sci. Technol.

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For mobile THz applications, integrated beam steering THz transmitters are essential. Beam steering approaches using leaky-wave antennas (LWAs) are attractive in that regard since they do not require complex feeding control circuits and beam steering is simply accomplished by sweeping the operating frequency. To date, only a few THz LWAs have been reported. These LWAs are based on polymer or graphene substrates and thus it is quite impossible to monolithically integrate these antennas with state-of-the-art indium phosphide (InP) based photonic or electronic THz sources and receivers. Therefore, in this paper, we report on an InP-based THz LWA for the first time. The developed and fabricated THz LWA consists of a periodic leaking microstrip line integrated with a grounded coplanar waveguide to microstrip line (GCPW-MSL) transition for future integration with InP-based photodiodes. For fabrication, a substrate-transfer process using silicon as carrier substrate for a 50 µm thin InP THz antenna chip has been established. By changing the operating frequency from 230 GHz to 330 GHz, the fabricated antenna allows to sweep the beam direction quasilinearly from-46° to 42°, i.e. the total scanning angle is 88°. The measured average realized gain and 3 dB beam width of a 1.5 mm wide InP LWA are ~11 dBi and 10°. This paper furthermore discusses the use of the fabricated LWA for THz interconnects. Index Terms-Beam steering, indium phosphide, leaky wave antenna, monolithic integrated circuits, wafer bonding. I. INTRODUCTION ERAHERTZ (THZ) waves feature distinct advantages compared to its neighboring spectra, making this frequency spectrum (0.1-10 THz) very attractive for several applications. THz waves are far less energetic than X-rays, i.e. they are nonionizing for biological tissues and, consequently, are promising for several medical applications [1-4]. Benefiting from the shorter wavelength in contrast to microwaves, THz waves offer a much higher spatial resolution which makes them quite intriguing for high-resolution imaging applications [5, 6]. Beyond the high spatial resolution, most dry dielectric materials are transparent for THz waves, whereas materials with high

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