US4590614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dipole antenna for portable radio
Assignee: Robert Bosch GmbH
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Filing: 1984-01-16
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Granted: 1986-05-20
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Expires: 2004-01-16
Abstract
Abstract A dipole antenna for a portable radio is contained completely within the insulated housing (10) of the transceiver. The dipole antenna is formed as two conductive surfaces (12, 13) electrically isolated from each other but disposed on the same printed circuit board (11) of the transceiver circuit which supports the circuit modules (14, 15). The two dipole halves are connected to each other by means of a dipole tuning circuit (29). The conductive tracks (23, 26, 27) of the transceiver circuit are interrupted at a location which divides as few tracks as possible. The interrupted tracks are bridged together by high-impedance resistors (22).
Inventors
- 👤 August Erat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:37
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/27
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A dipole antenna for a portable radio comprising an insulated housing, in which is disposed a printed circuit board supporting high-frequency (14,15) and low-frequency (16,17) elements, said circuit board having conductive tracks and conductive surfaces thereon, the conductive tracks and surfaces (12,13) as well as the high-frequency and low-frequency elements (14, 15, 16) are located on two separate regions of said circuit board, electrically isolated and divided from each other, each forming a dipole half (18,19), a dipole tuning circuit (29) for electrically connecting the conductive surfaces of the dipole halves (18,19), and high-impedance resistance means (22) for connecting the high-frequency elements (14,15) on one region (13) with the low-frequency elements (16,17) on the other region (12).
Claim 2
Dependent Claim
117 words
A dipole antenna for a portable radio comprising an insulated housing, in which is disposed a printed circuit board supporting high-frequency (14,15) and low-frequency (16,17) elements, said circuit board having conductive tracks and conductive surfaces thereon, the conductive tracks and surfaces (12,13) as well as the high-frequency and low-frequency elements (14, 15, 16) are located on two separate regions of said circuit board, electrically isolated and divided from each other, each forming a dipole half (18,19), a dipole tuning circuit (29) for electrically connecting the conductive surfaces of the dipole halves (18,19), and high-impedance resistance means (22) for connecting the high-frequency elements (14,15) on one region (13) with the low-frequency elements (16,17) on the other region (12).
Claim 3
Dependent Claim
28 words
The dipole antenna of claim 1, wherein the electrical division between the two dipole halves (18, 19) is selected such that a minimum of conductive tracks are interrupted.
Claim 4
Dependent Claim
43 words
The dipole antenna of claim 1, wherein the high-frequency elements include a demodulator (15) and the low-frequency elements include a low-frequency amplifier (16); and said electrical division is between the output of the demodulator (15) and the input of the low-frequency amplifier (16).
Claim 5
Dependent Claim
106 words
The dipole antenna of claim 1, wherein a positive terminal (33) of a battery (30) is connected with a first solder terminal (34) isolated from, but disposed within, a first dipole half (19) which is connected by means of a coil (35) with a second solder terminal (36) disposed within, but isolated from, a second dipole half (18), and in which the negative terminal (39) of the battery is connected directly to a conductive surface (13) of said first dipole half (19), and with a conductive surface (12) of the other dipole half (18) by means of a second coil (40) of the dipole tuning circuit.
Claim 6
Dependent Claim
33 words
The dipole antenna of claim 4, wherein said coil (35) between said solder terminals (34, 36) and said second coil (40) of said tuning circuit (29) are formed as a single double-wound coil.
Claim 7
Dependent Claim
36 words
The antenna of claim 1, wherein said printed circuit board comprises an insulating substrate bearing said conductive surfaces on one face thereof and conductive tracks on its other face for connecting said high-frequency and low-frequency elements.
Claim 8
Dependent Claim
27 words
The dipole antenna of claim 1, wherein some of said high-frequency and low-frequency elements have shielding housings which contribute to the formation of said dipole halves (18,19).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |