A Dual-Polarized Leaky Lens Antenna for Wideband Focal Plane Arrays

Yurduseven, Ozan; Juan, Nuria Llombart; Neto, A.

doi:10.1109/tap.2016.2574903

Cited by 28 publications

(25 citation statements)

References 31 publications

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“…Coming to a choice for the antenna, we compare printed antennas that have a broad band coverage: the log spiral antenna, 13 the sinuous antenna, 14 and the leaky lens antenna. 15 A compilation with all the expected performance for these antennas can be found in Yurduseven et al, 16 and it is summarised in Table I. We select the leaky lens antenna because it requires much larger minimum dimensions.…”

mentioning

confidence: 99%

Full characterisation of a background limited antenna coupled KID over an octave of bandwidth for THz radiation

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Yurduseven

Yates

et al. 2017

Applied Physics Letters

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We present the design, fabrication, and full characterisation (sensitivity, beam pattern, and frequency response) of a background limited broadband antenna coupled kinetic inductance detector covering the frequency range from 1.4 to 2.8 THz. This device shows photon noise limited performance with a noise equivalent power of 2.5 × 10−19 W/Hz1∕2 at 1.55 THz and can be easily scaled to a kilo-pixel array. The measured optical efficiency, beam pattern, and antenna frequency response match very well the simulations.

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confidence: 99%

Full characterisation of a background limited antenna coupled KID over an octave of bandwidth for THz radiation

Bueno

Yurduseven

Yates

et al. 2017

Applied Physics Letters

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“…The dual-polarized antenna is a replica of the configuration presented in [13] scaled to a frequency band from 1.4 THz to 2.8 THz and coupled to two orthogonal CPW lines instead of micro-strips. The choice for planar CPW lines is motivated by fabrication constraints.…”

Section: Antenna Optical Performancementioning

confidence: 99%

“…For single mode and single polarized antenna, this normalized throughput becomes Ω/ 2 = 1 2 as described in [14], [4], except for the fact of 2. Therefore, in [4], [13] and [18] the term 2 is called the optical coupling efficiency since it is always smaller than 1. In case of multi-mode detectors, the normalized throughput can be larger than one [14], which makes the use of the term optical efficiency improper.…”

Section: B Normalized Optical Throughputmentioning

confidence: 99%

“…The reception of two orthogonal linear polarizations will further increase the sensitivity. To this end a dual-polarized leaky lens based solution was proposed in [13]. In this contribution, we present the simulated and measured angular response and normalized optical throughput of a dualpolarized leaky-wave coupled MKID, shown in Fig1b, and compared it to its single-polarized version.…”

Section: Introductionmentioning

confidence: 99%

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Incoherent Detection of Orthogonal Polarizations via an Antenna Coupled MKID: Experimental Validation at 1.55 THz

Yurduseven

Bueno

Yates

et al. 2018

IEEE Trans. THz Sci. Technol.

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There is an increasing demand for large format detector arrays with large bandwidths and high antenna efficiencies for future THz astronomical radiometric applications. For direct detection instruments, it is also desired to have antennas with dual polarization reception in order to increase the received power from incoherent sources, thereby improving the observing speed of the instrument. The main goal of this work is the validation of the incoherent detection of two orthogonal polarizations by a leaky lens antenna, coupled to a single Microwave Kinetic Inductance Detector (MKID). Depending on the absorbed power over a distributed transmission line, the resonant frequency of the MKID changes. The proposed antenna is composed of two crossed leaky wave slots feeding a silicon extended hemispherical lens. The slots are coupled to four aluminum (Al) coplanar waveguide (CPW) lines that incoherently absorb the incoming THz radiation. The antenna and the power absorbing CPW lines are embedded inside the MKID, allowing an efficient radiation detection at THz frequencies where no lossless superconductors are available. The proposed dual-polarized device absorbs power incrementally over four different CPWs incoherently and is therefore simulated in reception (deriving a plane-wave response) similarly to what is done in distributed absorbers. We compare numerically and experimentally the proposed dual-polarized leaky lens coupled MKID and its single polarization counterpart and show that the dual polarized device receives twice as much power as the single-polarized one. Eventually, the dual-polarized device, when used with air-bridges, provides the same angular selectivity and twice the throughput of the single-polarized one.

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“…Therefore, with this order of magnitude in NEP, one can utilize a large operational bandwidth to achieve a practical sensitivity and imaging speed. Novel integrated wideband antenna concepts that can be exploited in this kind of scenario are connected arrays [25] or leaky lens antennas [26] which have been recently developed. The focus area of this work is indicated in Fig.…”

Section: Introductionmentioning

confidence: 99%