Superconducting antenna device
A superconducting antenna device of an embodiment includes an array antenna made by stacking a flat antenna having one or more antennas made of a superconducting material and a ground pattern on a low-loss dielectric substrate from a short wave band to an extremely-high frequency band, a vacuum chamber configured to accommodate the array antenna, a refrigerator configured to cool the array antenna, and a vacuum insulating window configured to pass an electromagnetic wave from a short wave band to an extremely-high frequency band in a direction of directivity of the array antenna in the vacuum chamber.
1. A superconducting antenna device comprising:
an array antenna made by stacking a flat antenna having one or more antennas made of a superconducting material and a ground pattern on a low-loss dielectric substrate from a short wave band to an extremely-high frequency band;
a vacuum chamber configured to accommodate the array antenna;
a refrigerator configured to cool the array antenna; and
a vacuum insulating window configured to pass an electromagnetic wave from a short wave band to an extremely-high frequency band in a direction of directivity of the array antenna in the vacuum chamber.
2. The device according to claim 1 , wherein two or more antennas made of the superconducting material are provided on the same surface, and
a distance between adjacent antennas made of the superconducting material is equal to or less than 1/10 of an resonant frequency of the antenna made of the superconducting material.
3. The device according to claim 1 , wherein the one or more antennas made of the superconducting material is connected to a feeding path, and
the feeding path is provided with a delay circuit.
4. The device according to claim 1 , wherein the one or more antennas made of the superconducting material is connected to a feeding path, and
the feeding path is provided with a resistance.
5. The device according to claim 1 , wherein the one or more antennas made of the superconducting material is any of monopole, dipole, inverted F, crank, spiral, CPW, and slot types.
6. The device according to claim 1 , wherein the one or more antennas made of the superconducting material is a spiral type, and
the longest side of the antenna made of the superconducting material is equal to or less than 1/10 of a wiring length of the antenna made of the superconducting material.
7. The device according to claim 1 , wherein an infrared reflection film is provided in a directivity direction on a surface of the array antenna.
8. The device according to claim 1 , wherein the one or more antennas made of the superconducting material is connected to an amplitude limiter, a band pass filter, a low noise amplifier, and a phase shifter.
9. The device according to claim 8 , wherein the amplitude limiter, the band pass filter, and the low noise amplifier is cooled by the refrigerator.