Substrate-loaded frequency-scaled ultra-wide spectrum element

Patent metadata

Field	Value
Publication number	US-10056699-B2
Application number	US-201514544935-A
Country	US
Kind code	B2
Filing date	Jun 16, 2015
Priority date	Jun 16, 2015
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A phased array antenna including a base plate and a board projecting from the base plate. The board including a dielectric layer and a conductive layer. The conductive layer includes first and second spaced apart radiating elements and a pillar disposed between the first and second spaced apart radiating elements. The pillar is electrically connected to the base plate, and the first and second spaced apart radiating elements are configured to capacitively couple to the pillar.

First claim

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1. A phased array antenna comprising:
a base plate; and
a printed circuit board projecting from the base plate, the printed circuit board comprising:
a dielectric substrate; and
a conductive layer disposed on the dielectric layer, wherein the conductive layer comprises:
first and second spaced apart radiating elements formed in the conductive layer; and
a pillar formed in the conductive layer and disposed between the first and second spaced apart radiating elements,

wherein:
the pillar is electrically connected to the base plate, and
the first and second spaced apart radiating elements are configured to capacitively couple to the pillar.

2. The phased array antenna of claim 1 , wherein the phased array antenna is configured to transmit or detect RF signals over a bandwidth ratio of at least 2:1.

3. The phased array antenna of claim 1 , wherein the antenna is configured to have an average voltage standing wave ratio of less than 5:1.

4. The phased array antenna of claim 1 , wherein the antenna is configured to have an average voltage standing wave ratio of less than 5:1 over a scan volume of at least 30 degrees from broadside.

5. The antenna of claim 1 , wherein the first and second radiating elements each comprise a ground portion that is electrically connected to the base plate and a signal portion that is electrically isolated from the base plate.

6. The antenna of claim 5 , wherein the ground portion of the first radiating element is located between the signal portion of the first radiating element and the pillar, and the signal portion of the second radiating element is located between the ground portion of the second radiating element and the pillar.

7. The antenna of claim 1 , wherein the conductive layer further comprises a second pillar and a third radiating element, and the second and third radiating elements are configured to capacitively couple to the second pillar.

8. The antenna of claim 1 , wherein the pillar comprises a first plurality of projections and the first radiating element comprises a second plurality of projections that project into gaps between projections of the first plurality of projections.

9. The antenna of claim 1 , further comprising a second printed circuit board projecting from the base plate, the second printed circuit board comprising a conductive layer disposed on a dielectric substrate of the second printed circuit board, wherein the conductive layer comprises a third radiating element that is configured to capacitively couple to the pillar.

10. The antenna of claim 9 , wherein the printed circuit boards are orthogonal to one another.

11. The antenna of claim 1 , further comprising a second conductive layer disposed on a second side of the dielectric substrate, the second conductive layer comprising a ground strip, wherein at least a portion of the ground strip and at least a portion of the first radiating element form a microstrip or a stripline.

12. The antenna of claim 1 , wherein the first and second radiating elements are configured to receive RF signals in a frequency range between a first frequency and a second frequency that is higher than the first frequency and the first and second radiating elements project from the base plate with a maximum height of one-half the wavelength of the second frequency.

Assignees

• Mitre Corp
• Us Navy
• The Mitre Coop
• The United States Of America As Rep By The Sec Of Navy

Inventors

• Elsallal Wajih
• Hood Jamie
• Locker Al
• Kindt Rick

Classifications

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q5/25 Primary

  Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems · CPC title

• H01Q21/061 Primary

  Two dimensional planar arrays · CPC title

• H01Q21/24

  Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)} · CPC title

• H01Q21/064

  using horn or slot aerials (slotted waveguides arrays H01Q21/005) · CPC title