Performance of a four-element Ka-band high-temperature superconducting microstrip antenna

Richard, M.A.; Bhasin, K. B.; Gilbert, Ciaran; Metzler, S.; Koepf, G. A.; Claspy, P. C.

doi:10.1109/75.129442

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…We note that the microstrip feeding line is L = 5 mm long ( Figure 2). This result is in agreement with a fourelement HTS antenna array that exhibited a performance improvement of 2 dB at 70 K [16].…”

Section: Resultssupporting

confidence: 89%

Experimental results on a 38-GHz high-temperature superconducting microstrip antenna

Castel

Floc'H

Guilloux‐Viry

et al. 1996

Microw. Opt. Technol. Lett.

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We have designed and fabricated a superconducting microstrip antenna operating at 38 GHz after we patterned a YBa,Cu,O, thin film epitaxially grown on (100) MgO substrate by laser ablation. The experimental performance of this superconducting antenna was measured in a homemade vacuum setup and compared to a similar silver antenna. Measurements show eficiency improvement of the superconducting antenna oc'er the silver one ABSTRACT A transmission-line-mattix (TLM) node equiualent. the TLM-based jinite-difference-time-domain IFDTD) method, has been recently propo.red to allow the simulation of electromagnetic fields in a FDTD fashion. As a result, modeling and simulation techniques deidoped for the conrxntional FDTD scheme can be directly implemented into the TLM-based algorithm. In this article the nonlinear modeling scheme acconiplished with a Z transfom is adapted and implemented in the proposed TLM-based FDTD method, to simulate the electromagnetic behaL,iors in optical media with nonlinear polarization, such as Kerr and Raman effects. Numerical results are presented for one-dimensional calculation of propagation of femtosecond electromagneric solitons that retain the optical carriers. The results are in good agreemeni with those obtained from the conuentional FDTD simulation. In conclusion. thr TLM-based FDTD method is found fo be robust undfiexible in 2D and 3D modeling. 0 1996 John Wley & Sons, Inc.

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Section: Resultssupporting

confidence: 89%

Experimental results on a 38-GHz high-temperature superconducting microstrip antenna

Castel

Floc'H

Guilloux‐Viry

et al. 1996

Microw. Opt. Technol. Lett.

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show abstract

“…Figure 10 shows the comparative gain of these arrays. Here, we may point out that the gain improvement in the YBCO antennas (single patch and array) in this report is comparable to the other studies [23][24][25], where a gain improvement of about 2-4 dB has been reported. Also the measured lower axial ratio bandwidth of these antennas agrees well with the theoretical result [15].…”

Section: Array Antennassupporting

confidence: 88%

Single-feed superconducting circularly polarized microstrip array antenna for direct-to-home receiving system

Ali¹,

Ehata²,

Ohshima³

2000

Supercond. Sci. Technol.

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Single-feed circularly polarized microstrip patch and patch array antennas for `direct-to-home' receiving system at around 12 GHz are studied by theoretical analysis and experiments. A full-wave microwave circuit simulator (Em), based on the method of moments and capable of handling the microwave surface impedance, has been used in the theoretical analysis of the antennas. Antennas have been fabricated from both normal conductor (gold) and YBa2Cu3O7-x (YBCO) superconductor for comparison. Measured results on resonant frequency (fr), return loss, gain, bandwidth, and axial ratio are presented. The antennas are found to show a very low axial ratio and a moderate bandwidth. In the comparison of gain, the superconducting antennas showed a remarkable improvement over their gold counterparts. The receiving power of a four-element array fabricated from a single-side YBCO thin film on (100) MgO single crystal substrate is found to be 1.8 dB higher than that of a gold array with identical configuration and both measured at 77 K.

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“…Therefore, for the transmission of maximum input power to the antenna and, hence, to get maximum gain, appropriate adjustment of the notch length and inset gap is important. Besides, it is noteworthy that as the antenna efficiency is proportional to the antenna gain [15], the antenna efficiency will also be influenced by the change of notch length and inset gap. room temperature.…”

Section: Resultsmentioning

confidence: 99%

Effect of inset feeding on antenna properties in a superconducting microstrip antenna

Ali¹,

Ohshima²

2005

Supercond. Sci. Technol.

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Effects of ‘inset feeding’ on microstrip antenna properties have been investigated by analysing the designed and experimental results. Dimensions of a single-patch antenna with this feed architecture have been optimized with an operating frequency of 11.74 GHz with the aim of using it to fabricate a superconducting microstrip array antenna for a direct broadcast satellite (DBS) communication system. In our observation, the antenna gain, resonant frequency and input impedance of the antenna are found to change with change of the feed architecture. A single-patch YBa2Cu3O7−δ (YBCO) superconducting antenna and a gold antenna with this optimized structure have been fabricated for the comparison of properties between these two types of antennas. The comparison of the gain between the YBCO superconducting and gold antennas measured at 77 K shows that the YBCO antenna has 1.8 dB higher gain than the gold antenna with an identical configuration.

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Performance of a four-element Ka-band high-temperature superconducting microstrip antenna

Cited by 14 publications

References 4 publications

Experimental results on a 38-GHz high-temperature superconducting microstrip antenna

Experimental results on a 38-GHz high-temperature superconducting microstrip antenna

Single-feed superconducting circularly polarized microstrip array antenna for direct-to-home receiving system

Effect of inset feeding on antenna properties in a superconducting microstrip antenna

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