Waveguide to coaxial line transition having rigid hollow cone portions

Patent metadata

Field	Value
Publication number	US-9917343-B2
Application number	US-201615183571-A
Country	US
Kind code	B2
Filing date	Jun 15, 2016
Priority date	Mar 16, 2016
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A coaxial to waveguide transition includes a first rigid portion comprising an inverted hollow cone, a second rigid portion comprising a hollow tube, and a third rigid portion comprising a hollow cone. The first rigid portion has a first end and a second end, and tapers inward at a first angle from its first end towards its second end. The second rigid portion has a first end and a second end, with the first end being partially disposed within the second end of the first rigid portion. The third rigid portion has a first end and a second end, with the first end of the third rigid portion being partially disposed within the second end of the second rigid portion. The third rigid portion tapers outward at a second angle from its first end towards its second end, where the second angle is less than the first angle.

First claim

We claim:

1. A system comprising:
a first rigid portion comprising an inverted hollow cone, the first rigid portion having a first end and a second end, wherein the first rigid portion tapers inward at a first angle from the first end towards the second end;
a second rigid portion comprising a hollow tube, the second rigid portion having a first end and a second end, wherein the first end of the second rigid portion is at least partially disposed within the second end of the first rigid portion; and
a third rigid portion comprising a hollow cone, the third rigid portion having a first end and a second end, wherein the first end of the third rigid portion is at least partially disposed within the second end of the second rigid portion, wherein the third rigid portion tapers outward at a second angle from the first end towards the second end.

2. The system of claim 1 , wherein the first rigid portion, the second rigid portion, and the third rigid portion have a combined height of about 11 mm, the diameter of the first end of the first rigid portion is about 12 mm, the diameter of the second end of the first rigid portion is about 6.1 mm, the diameter of the first end of the third rigid portion is about 3.5 mm, and the diameter of the second end of the third rigid portion is about 6.1 mm.

3. The system of claim 1 further comprising a waveguide having a top plate and a bottom plate, wherein the first end of the first rigid portion is in contact with the top plate.

4. The system of claim 3 , wherein the second end of the third rigid portion is connected to the bottom plate.

5. The system of claim 3 , wherein the top plate has an opening therein configured to receive a pin of a coaxial cable therethrough.

6. The system of claim 5 , wherein the top plate, the first rigid portion, the second rigid portion, and the third rigid portion are sized such that when the pin of the coaxial cable passes through the opening, the pin becomes electrically connected to the third rigid portion.

7. The system of claim 3 , wherein the top plate is separated from the bottom plate by a distance of about 10 mm.

8. The system of claim 1 , wherein the first angle and the second angle are determined according to the equation

Z
c

=

1

2
⁢
π

⁢

μ
ϵ

⁢
ln
⁢

tan
⁡

(

θ
2

2

)

tan
⁡

(

θ
1

2

)

,

where Z c is the impedance, μ is permeability of a medium, ∈ is permittivity of the medium, θ 1 is the first angle, and θ 2 is the second angle.

9. The system of claim 1 , wherein the first angle is less than 90 degrees and the second angle is greater than 90 degrees.

10. A system comprising:
a first rigid portion comprising an inverted hollow cone, the first rigid portion having a first end and a second end, wherein the first rigid portion tapers inward at a first angle from the first end towards the second end;
a second rigid portion comprising a hollow tube, the second rigid portion having a first end and a second end, wherein the first end of the second rigid portion is at least partially disposed within the second end of the first rigid portion;
a third rigid portion comprising a hollow cone, the third rigid portion having a first end and a second end, wherein the first end of the third rigid portion is at least partially disposed within the second end of the second rigid portion, wherein the third rigid portion tapers outward at a second angle from the first end towards the second end; and
a waveguide having a top plate and a bottom plate, wherein the first end of the first rigid portion is in contact with the top plate, wherein the second end of the third rigid portion is connected to the bottom plate, wherein the top plate has an opening therein configured to receive a pin of a coaxial cable therethrough.

11. The system of claim 10 , wherein the first rigid portion, the second rigid portion, and the third rigid portion have a combined height of about 11 mm, the diameter of the first end of the first rigid portion is about 12 mm, the diameter of the second end of the first rigid portion is about 6.1 mm, the diameter of the first end of the third rigid portion is about 3.5 mm, and the diameter of the second end of the third rigid portion is about 6.1 mm.

12. The system of claim 10 , wherein the top plate, the first rigid portion, the second rigid portion, and the third rigid portion are sized such that when the pin of the coaxial cable passes through the opening, the pin becomes electrically connected to the third rigid portion.

13. The system of claim 10 , wherein the first angle and the second angle are determined according to the equation

Z
c

=

1

2
⁢
π

⁢

μ
ϵ

⁢
ln
⁢

tan
⁡

(

θ
2

2

)

tan
⁡

(

θ
1

2

)

,

where Z c is the impedance, μ is permeability of a medium, ∈ is permittivity of the medium, θ 1 is the first

Assignees

• Us Navy

Inventors

• Chieh Jia-Chi S
• Clawson Aaron
• Civerolo Michael

Classifications

• H01P5/103 Primary

  Hollow-waveguide/coaxial-line transitions · CPC title

• H03F3/55

  with semiconductor devices only · CPC title

• H01P5/08

  for linking dissimilar lines or devices (H01P1/16, H01P5/04 take precedence; linking lines of the same kind but with different dimensions H01P5/02) · CPC title

• H01P5/12

  Coupling devices having more than two ports (H01P5/04 takes precedence) · CPC title