Development of Highly Constrained 1 m <i>Ka</i>-Band Mesh Deployable Offset Reflector Antenna for Next Generation CubeSat Radars

Rahmat‐Samii, Y.; Manohar, Vignesh; Kovitz, Joshua M.; Hodges, Richard E.; Freebury, Gregg; Peral, Eva

doi:10.1109/tap.2019.2920223

Cited by 42 publications

(22 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the core of new capabilities such as RainCube shown in Figure 9, ubiquitous advancements in digital technology (almost entirely enabled by needs in commercial electronics) are front and center to all current radar concepts since they enable digital waveform generation and signal processing, low sidelobe pulse compression and compact and low power radar architectures. Another area that has seen critical improvements is that of lightweight deployable antennas (e.g., mesh and membrane) and ultra compact antennas (e.g., metasurface and reflectarray), at centimeter and millimeter waves (see comprehensive reviews in Chahat, Decrossas, et al, 2019;Chahat, Sauder, et al 2019, and;Rahmat-Samii et al, 2019). Similarly, advancements in solid state power amplifiers and low noise amplifiers at millimeter and submillimeter wave (on GaAs, GaN, InP, and SiGe substrates), as well as power combination and compact vacuum electron devices, have reached or are reaching levels of performance that make them directly applicable to state of the art radar concepts.…”

Section: Advances In Technologymentioning

confidence: 99%

“…Another area that has seen critical improvements is that of lightweight deployable antennas (e.g., mesh and membrane) and ultra compact antennas (e.g., metasurface and reflectarray), at centimeter and millimeter waves (see comprehensive reviews in Chahat, Decrossas, et al., 2019; Chahat, Sauder, et al. 2019, and; Rahmat‐Samii et al., 2019). Similarly, advancements in solid state power amplifiers and low noise amplifiers at millimeter and submillimeter wave (on GaAs, GaN, InP, and SiGe substrates), as well as power combination and compact vacuum electron devices, have reached or are reaching levels of performance that make them directly applicable to state of the art radar concepts.…”

Section: Future Outlookmentioning

confidence: 99%

See 1 more Smart Citation

Spaceborne Cloud and Precipitation Radars: Status, Challenges, and Ways Forward

Battaglia

Kollias

Dhillon

et al. 2020

Reviews of Geophysics

View full text Add to dashboard Cite

Spaceborne radars offer a unique three‐dimensional view of the atmospheric components of the Earth's hydrological cycle. Existing and planned spaceborne radar missions provide cloud and precipitation information over the oceans and land difficult to access in remote areas. A careful look into their measurement capabilities indicates considerable gaps that hinder our ability to detect and probe key cloud and precipitation processes. The international community is currently debating how the next generation of spaceborne radars shall enhance current capabilities and address remaining gaps. Part of the discussion is focused on how to best take advantage of recent advancements in radar and space platform technologies while addressing outstanding limitations. First, the observing capabilities and measurement highlights of existing and planned spaceborne radar missions including TRMM, CloudSat, GPM, RainCube, and EarthCARE are reviewed. Then, the limitations of current spaceborne observing systems, with respect to observations of low‐level clouds, midlatitude and high‐latitude precipitation, and convective motions, are thoroughly analyzed. Finally, the review proposes potential solutions and future research avenues to be explored. Promising paths forward include collecting observations across a gamut of frequency bands tailored to specific scientific objectives, collecting observations using mixtures of pulse lengths to overcome trade‐offs in sensitivity and resolution, and flying constellations of miniaturized radars to capture rapidly evolving weather phenomena. This work aims to increase the awareness about existing limitations and gaps in spaceborne radar measurements and to increase the level of engagement of the international community in the discussions for the next generation of spaceborne radar systems.

show abstract

Section: Advances In Technologymentioning

confidence: 99%

Section: Future Outlookmentioning

confidence: 99%

Spaceborne Cloud and Precipitation Radars: Status, Challenges, and Ways Forward

Battaglia

Kollias

Dhillon

et al. 2020

Reviews of Geophysics

View full text Add to dashboard Cite

show abstract

“…Current high-gain antennas for satellites are heavy and bulky, because relatively rigid structures are used to maintain high surface accuracy in orbit. Deployable high gain antennas for small satellites typically fall into three categories: mesh reflectors [4], [5]; membrane reflectarray and patch array antennas [6]- [8]; and rigid panel deployable reflectarray and waveguide slot array antennas [9]- [11]. Mesh reflectors and membrane antennas offer a large aperture area with low weight.…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes

2021

View full text Add to dashboard Cite

Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band reflectarray antennas by varactor diodes. Active reflection elements are composed of a square patch with the varactor diodes and parameters are characterized in a waveguide. The results of the simulated and measured reflection characteristics agree because of the accurate numerical modelling of the varactor diode. A reflectarray with a stepped structure for misalignment compensation is designed and characterized. The stepped misalignment degrades the antenna gain because the phase distribution is disturbed. Adjusting the reflection phase of the deformed elements compensates the disturbed phase distribution and improves the antenna gain. The gain improvement is confirmed by both simulations and measurements of the antenna gain.

show abstract

“…For long-distance wireless, e.g. satellite, and radar communication systems, an operating frequency in the Ka-band (26.5 GHz to 40 GHz) is typically preferred as it enables high data-rate links and miniaturized antenna systems [15]- [17]. When employing LWAs for such systems it is advantageous to utilize CP waves rather than linearly polarized (LP) waves due to the fact that CP LWAs avoids polarization mismatch and also suppresses multipath interference during beam scanning [18]- [20].…”

Section: Introductionmentioning

confidence: 99%

A Broadband High-Gain Circularly Polarized Wide Beam Scanning Leaky-Wave Antenna

et al. 2020

View full text Add to dashboard Cite

A new type of broadband circularly polarized leaky-wave antenna (LWA) with high-gain based on a corrugated substrate integrated waveguide (CSIW) structure is proposed and investigated. The CSIW structure that employs open-circuit stubs to replace metallic vias has the advantages of low-cost and easy fabrication as compared to conventional substrate integrated waveguides. Each unit-cell of the proposed LWA consists of two quarter-wavelength microstrip lines and a half-mode CSIW cell with three opencircuit stubs. Two M-shaped slots etched on the half-mode CSIW cell enables the generation of circularly polarized (CP) radiation. The full LWA, which consists of thirteen matched unit-cells cascaded along the direction of propagation enables continuous backward to forward beam scanning. The properties of the CSIW structure, including impedance matching and phase constant, are analyzed by Bloch impedance and dispersion simulations and the influence of the dimensions of the open-circuit stubs on the CP LWA performance is also investigated. A protype of the proposed LWA is fabricated and characterized. The measured results indicate that the proposed CSIW LWA has a high peak gain (9.3-12.5 dBi) throughout a large beam-scanning angle range from −28 • to +25 • , and the impedance bandwidth and 3-dB axial ratio (AR) bandwidth are over 40% covering the full Ka-band. INDEX TERMS Leaky-wave antenna (LWA), corrugated substrate integrated waveguide (CSIW), circular polarization (CP), beam scanning, Ka-band, broadband.

show abstract

Development of Highly Constrained 1 m Ka-Band Mesh Deployable Offset Reflector Antenna for Next Generation CubeSat Radars

Cited by 42 publications

References 21 publications

Spaceborne Cloud and Precipitation Radars: Status, Challenges, and Ways Forward

Spaceborne Cloud and Precipitation Radars: Status, Challenges, and Ways Forward

Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes

A Broadband High-Gain Circularly Polarized Wide Beam Scanning Leaky-Wave Antenna

Contact Info

Product

Resources

About