US4413242A
Expired / Lapsed
US
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Hybrid tee waveguide assembly
Assignee: ATLANTIC MICROWAVE Corp
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Filing: 1981-08-31
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Granted: 1983-11-01
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Expires: 2001-08-31
Abstract
Abstract An improved magic tee constructed to maximize the power that can be transferred from the H-plane arm to the collinear side arms and vice versa. The matching post is designed to maximize the breakdown voltage between the post tip and the walls of the E-plane arm. This is accomplished by selecting the post diameter to produce a ratio of the E-plane arm height to post diameter which develops a characteristic impedance corresponding to that of a coaxial transmission line constructed to withstand the maximum breakdown voltage between the transmission line center conductor and conductive shielding for a given shield separation.
Inventors
- 👤 Albert H. Reeves
- 👤 Joseph S. Michalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:15
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19; H01P5/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A hybrid junction having enhanced power handling capacity, said hybrid junction having an H-plane arm, an E-plane arm and two collinear side arms formed of waveguide sections, said power being suppliable to said hybrid junction at the input of the H-plane arm, said hybrid junction including an H-plane arm matching post located in the junction formed by the intersection of the E-plane arm, the H-plane arm and the two collinear side arms and extending into the E-plane arm said E-plane arm having a known height, said matching post having a diameter such that the ratio of the E-plane arm height to the post diameter would yield a characteristic impedance of approximately 60 ohms in a transmission line having a circular center conductor extending between parallel ground planes having dimensions and a geometric relationship equivalent to the dimensions and geometric relationship of said matching post in relation to said E-plane arm, whereby the maximum power transfer without breakdown is achieved in said hybrid junction.
Claim 2
Dependent Claim
163 words
A hybrid junction having enhanced power handling capacity, said hybrid junction having an H-plane arm, an E-plane arm and two collinear side arms formed of waveguide sections, said power being suppliable to said hybrid junction at the input of the H-plane arm, said hybrid junction including an H-plane arm matching post located in the junction formed by the intersection of the E-plane arm, the H-plane arm and the two collinear side arms and extending into the E-plane arm said E-plane arm having a known height, said matching post having a diameter such that the ratio of the E-plane arm height to the post diameter would yield a characteristic impedance of approximately 60 ohms in a transmission line having a circular center conductor extending between parallel ground planes having dimensions and a geometric relationship equivalent to the dimensions and geometric relationship of said matching post in relation to said E-plane arm, whereby the maximum power transfer without breakdown is achieved in said hybrid junction.
Claim 3
Dependent Claim
14 words
The hybrid junction of claim 1 wherein said hybrid junction is a magic tee.
Claim 4
Dependent Claim
39 words
The hybrid junction of claim 1 wherein said matching post is formed on a button base, said button base having a well surrounding said post, whereby the post length is effectively lengthened without extending the tip of the post.
Claim 5
Dependent Claim
47 words
The hybrid junction of claim 1 wherein the diameter of the matching post is determined according to the relationship: Z.sub.o '=138 log 10(4h/πD) where: Z o '=approximately 60 ohms, h=height of the waveguide forming the E-plane arm, D=diameter of the post portion of the matching button post.
Claim 6
Dependent Claim
154 words
A magic tee type hybrid junction comprising four rectangular waveguide sections forming an H-plane arm, an E-plane arm and two collinear side arms, a matching button post positioned in the junction of the magic tee for matching the H-plane arm to the input waveguide, said button post being comprised of a button portion and a post portion extending from said button portion into said E-plane arm, said post portion having a diameter selected such that the ratio of the height of the waveguide section forming the E-plane arm to the post diameter would yield a characteristic impedance of approximately 60 ohms in a transmission line having a circular center conductor extending between parallel ground planes having dimensions and a geometric relationship equivalent to the dimensions and geometric relationship of said matching post in relation to said E-plane arm, whereby the maximum power transfer without breakdown is achieved in said magic tee type hybrid junction.
Claim 7
Dependent Claim
154 words
A magic tee type hybrid junction comprising four rectangular waveguide sections forming an H-plane arm, an E-plane arm and two collinear side arms, a matching button post positioned in the junction of the magic tee for matching the H-plane arm to the input waveguide, said button post being comprised of a button portion and a post portion extending from said button portion into said E-plane arm, said post portion having a diameter selected such that the ratio of the height of the waveguide section forming the E-plane arm to the post diameter would yield a characteristic impedance of approximately 60 ohms in a transmission line having a circular center conductor extending between parallel ground planes having dimensions and a geometric relationship equivalent to the dimensions and geometric relationship of said matching post in relation to said E-plane arm, whereby the maximum power transfer without breakdown is achieved in said magic tee type hybrid junction.
Claim 8
Dependent Claim
48 words
The magic tee hybrid junction as claimed in claim 5 wherein the post diameter is determined according to the relationship: Z.sub.o '=138 log 10(4h/πD) where: Z o '=approximately 60 ohms, h=height of the waveguide forming the E-plane arm, D=diameter of the post portion of the matching button post.
Claim 9
Dependent Claim
62 words
The magic tee type hybrid junction as claimed in claim 5 wherein said button portion of the matching button post contains a well surrounding the post portion, said well having a selected depth to determine the length of the post portion while maintaining the distance between the upper tip of the post protion and a reference location on the E-plane arm constant.
Claim 10
Dependent Claim
82 words
A hybrid junction having enhanced power handling capacity comprising four waveguide sections forming an H-plane arm, an E-plane arm, two collinear side arms and a matching post extending into said E-plane arm, said hybrid junction designed using a method comprising the steps of: selecting the diameter of the matching post according to the relationship: Z.sub.o '=138 log 10(4h/πD) where: Z o '=approximately 60 ohms, h=height of the waveguide forming the E-plane arm, D=diameter of the post portion of the matching button post.
Claim 11
Dependent Claim
82 words
A hybrid junction having enhanced power handling capacity comprising four waveguide sections forming an H-plane arm, an E-plane arm, two collinear side arms and a matching post extending into said E-plane arm, said hybrid junction designed using a method comprising the steps of: selecting the diameter of the matching post according to the relationship: Z.sub.o '=138 log 10(4h/πD) where: Z o '=approximately 60 ohms, h=height of the waveguide forming the E-plane arm, D=diameter of the post portion of the matching button post.
Claim 12
Dependent Claim
54 words
The method of claim 8 further including the step of locating said matching post on a button base of the same material as the matching post and forming a well in said button base surrounding said post such that the length of the post is determined at least in part by the well depth.
References Cited (Backward Citations)
US3375472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |