Nanosatellite high gain antenna, fluidized rods including the same, and fluidized supports

Patent metadata

Field	Value
Publication number	US-2022158334-A1
Application number	US-202117523213-A
Country	US
Kind code	A1
Filing date	Nov 10, 2021
Priority date	Nov 19, 2020
Publication date	May 19, 2022
Grant date	—

Abstract

A nanosatellite or drone, including an antenna; a dielectric waveguide coupled to the antenna, the waveguide comprising at least one of a slot or a taper and the waveguide (1) focusing electromagnetic radiation incident from free space into the waveguide and (2) waveguiding the electromagnetic radiation to the antenna. Also disclosed is a system for deploying a support structure, or device having electromagnetic functionality, including one or more bags each having a wall comprising a membrane; one or more conduits each having an outlet transferring fluid into the one or more of the bags in fluidic communication with the conduits, wherein the fluid pressurizes each of the one or more bags and expands the membrane so as to deploy and form each of the one or more bags into a support or the device having electromagnetic functionality.

First claim

What is claimed is:

1 . An apparatus, comprising:
a nanosatellite or drone, including:
an antenna; and
a waveguide coupled to the antenna, the waveguide comprising a dielectric:
focusing electromagnetic radiation incident from free space into the waveguide,
waveguiding the electromagnetic radiation to the antenna, and
comprising at least one of a slot or a taper.

2 . The apparatus of claim 1 , wherein the slot is dimensioned to accommodate the antenna.

3 . The apparatus of claim 2 , further comprising a mechanism holding the antenna at a position within the slot where the electromagnetic radiation has a peak electric field and wherein the antenna is tuned to receive the peak electric field.

4 . The apparatus of claim 1 , wherein:
the waveguide comprises a first end and a second end, the antenna is coupled to the second end, the taper is at the first end so that the first end is narrower than the second end, and the waveguide waveguides the electromagnetic radiation from the first end to the second end.

5 . The apparatus of claim 1 , wherein the waveguide comprises a rod having a dielectric constant of at least 5 for the electromagnetic radiation having a frequency f in a range 100 MHz≤f≤1 GHz.

6 . The apparatus of claim 5 , wherein the rod has a width a factor of at least a 100 times smaller than a wavelength of the electromagnetic radiation in free space and the dielectric constant shrinks the wavelength to confine the electromagnetic radiation in a single mode within the waveguide.

7 . The apparatus of claim 5 , wherein the rod has a length at least 2 times a diameter of the rod.

8 . The apparatus of claim 5 , wherein the rod has a width a range of 1-5 cm and a length in a range of 5-20 cm and the electromagnetic radiation comprises radio frequency radiation having a wavelength in a range of 30 cm to 1 meter.

9 . The apparatus of claim 5 , wherein the rod comprises strontium titanate, fluid, or alumina.

10 . The apparatus of claim 5 , wherein the rod comprises ice or water.

11 . The apparatus of claim 1 , wherein the waveguide comprises a width and dielectric constant wherein the waveguide is impedance matched to the antenna so as to tailor a gain and bandwidth of the antenna for the electromagnetic radiation.

12 . The apparatus of claim 11 , wherein the bandwidth is less than 3 dB for the electromagnetic radiation having a center frequency f in a range of 100 MHz≤f≤1 GHz.

13 . The apparatus of claim 1 , wherein the waveguide comprises ice formed from water freezing in a bag.

14 . The apparatus of claim 1 , wherein the waveguide has circular, polygonal, or rectangular cross-section.

15 . The apparatus of claim 1 , wherein the antenna is a dipole antenna or probe.

16 . The apparatus of claim 1 , wherein the slot is filled with a liquid having a refractive index that matches that of the dielectric.

17 . The apparatus of claim 1 , wherein the taper has a linear, quadratic, or exponential shape.

18 . The apparatus of claim 1 , wherein the antenna is connected to a coax cable.

19 . The apparatus of claim 1 , wherein the slot has a first taper and the waveguide has a second taper.

20 . The apparatus of claim 1 , wherein a front face of the waveguide comprising a rod has an antireflective coating that is anti-reflective for the electromagnetic radiation.

Assignees

• Boeing Co

Inventors

• Hiller Nathan D
• Loheit Kurt W

Classifications

• H01Q13/12

  Longitudinally slotted cylinder antennas; Equivalent structures · CPC title

• H01Q1/081

  Inflatable antennas · CPC title

• H01Q1/08

  Means for collapsing antennas or parts thereof (collapsible loop antennas H01Q7/02; means for collapsing H-antennas or Yagi antennas H01Q19/04) · CPC title

• H01Q1/288 Primary

  Satellite antennas · CPC title

• H01Q13/20

  Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave · CPC title