GB1406141A - Antenna assembly - Google Patents
Antenna assemblyInfo
- Publication number
- GB1406141A GB1406141A GB17473A GB17473A GB1406141A GB 1406141 A GB1406141 A GB 1406141A GB 17473 A GB17473 A GB 17473A GB 17473 A GB17473 A GB 17473A GB 1406141 A GB1406141 A GB 1406141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- points
- cavity
- coaxial
- open
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/286—Adaptation for use in or on aircraft, missiles, satellites, or balloons substantially flush mounted with the skin of the craft
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
Abstract
1406141 Aerials BALL BROS RESEARCH CORP 2 Jan 1973 174/73 Heading H4A The invention is concerned with an aerial arrangement for a propelled vehicle, such as a missile, in which a conductive cylindrical element of greater diameter than the body of said vehicle is positioned thereabout, and is connected thereto at one end to define a coaxial cavity which is open at one end and closed at the other. Electrical signal feed means are connected to the open end of the cavity at either one point or at a plurality of points which are equally spaced around the periphery. The invention also includes an aerial arrangement of a coaxial cavity which is open at one end and closed at the other, and which is fed with an electrical signal at the open end by means connected to a plurality of points which are equally spaced around the periphery. As described, a missile 12, Fig. 1, has a metallic cylindrical body 14, which is excited as an asymmetric wide band dipole by means of an annular slot element 10, located near the nose portion 15. Said element 10 comprises a conductive ring 16, Fig. 2, which is uniformly spaced from the body 14 by insulating material 18 (e.g. P.T.F.E.), and which at its forward end is fixed to, and is closed by a conductive ring member 22. Said member 22 is secured to the body 14 by screws 23, and is of substantially triangular cross-section to reduce air drag. The annular cavity so formed has a depth equivalent to a quarter wavelength at the operating carrier frequency, and it is excited at a plurality (e.g. fourteen) of equi-spaced points around its perimeter by means of coaxial lines, such as 30, 32, which are fed from a signal source 25 by a power divider 28. The spacing between a pair of feed points may be approximately one wavelength at the said frequency. As is shown in respect of the line 30, a coaxial jack 44 is provided at each feed point, the outer member 52 thereof being mounted inside the body 14, and the inner member 50 thereof being extended to the ring 16. At the end of the outer conductor 35 of the line 30 a ring 40 is soldered on, and this is clamped to the member 52 by means of a gland nut 42. The end of the inner conductor 34 of the line 30 has a sleeve 45 which receives the inner member 50 of the jack 44. The radiation pattern obtainable approximates to isotropic, apart from deep nulls fore and aft (Fig. 4, not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB17473A GB1406141A (en) | 1973-01-02 | 1973-01-02 | Antenna assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB17473A GB1406141A (en) | 1973-01-02 | 1973-01-02 | Antenna assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1406141A true GB1406141A (en) | 1975-09-17 |
Family
ID=9699723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17473A Expired GB1406141A (en) | 1973-01-02 | 1973-01-02 | Antenna assembly |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1406141A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498015A1 (en) * | 1981-01-09 | 1982-07-16 | France Etat | Microstrip antenna with rectangular baseplate - has axial groove covered by metal strip extending from one plate edge with excitation points supplied from tree form strip line |
-
1973
- 1973-01-02 GB GB17473A patent/GB1406141A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498015A1 (en) * | 1981-01-09 | 1982-07-16 | France Etat | Microstrip antenna with rectangular baseplate - has axial groove covered by metal strip extending from one plate edge with excitation points supplied from tree form strip line |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19921231 |