Patent US4096441A successfully refreshed from Google Patents.
US4096441A
Expired / Lapsed
US
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Test instrument for transmitters
Assignee: Rite Autotronics Corp
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Filing: 1976-10-12
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Granted: 1978-06-20
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Expires: 1996-10-12
Abstract
Abstract The herein disclosed test instrument includes an arrangement for measuring the standing wave ratio of a transmitter, antenna combination which comprises a printed circuit board having a first conductive path thereon adapted for connection in series with the energy flowing between a transmitter and its associated antenna, a second conductive path contiguously disposed on the printed circuit board such that energy is electro-magnetically coupled from the first to the second conductive paths; circuit means for sequentially measuring the energy flowing in opposite directions along the second conductive path; and meter means for displaying the ratio of the measured energy. The test instrument further includes a circuit for measuring the transmitter's output power wherein the "loading" of the metering circuit on the transmitter is substantially reduced.
Inventors
- 👤 Edwin L. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:45
CPC Classifications
H; H04; H04B; H04B17/00; H04B17/10; H04B17/15; H04B17/18; H04B17/101; H04B17/102; H04B17/103
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A test instrument for selectively measuring the standing wave ratio between a transmitter and an associated antenna, transmitter output power, and antenna radiated power, comprising: a printed circuit board having a first conductive path thereon, means adapted for connecting said conductive path in series with the energy flow between the transmitter and antenna, and a second conductive path contiguous to at least a portion of said first conductive path whereby energy is electromagnetically coupled from said first to said second conductive paths; circuit means for sequentially measuring the energy flowing in opposite directions along said second conductive path and for selectively providing a first signal indicative of said standing wave ratio; means for selectively providing a second signal indicative of the transmitter's output power; means for monitoring antenna radiated power and for selectively providing a third signal indicative of said radiated power; and meter means for selectively displaying an indication of said first, second or third signals.
Claim 2
Dependent Claim
157 words
A test instrument for selectively measuring the standing wave ratio between a transmitter and an associated antenna, transmitter output power, and antenna radiated power, comprising: a printed circuit board having a first conductive path thereon, means adapted for connecting said conductive path in series with the energy flow between the transmitter and antenna, and a second conductive path contiguous to at least a portion of said first conductive path whereby energy is electromagnetically coupled from said first to said second conductive paths; circuit means for sequentially measuring the energy flowing in opposite directions along said second conductive path and for selectively providing a first signal indicative of said standing wave ratio; means for selectively providing a second signal indicative of the transmitter's output power; means for monitoring antenna radiated power and for selectively providing a third signal indicative of said radiated power; and meter means for selectively displaying an indication of said first, second or third signals.
Claim 3
Dependent Claim
21 words
The test instrument of claim 1 wherein: said first and second conductive paths each have at least one substantially curved section.
Claim 4
Dependent Claim
55 words
The test instrument of claim 1 wherein: said circuit means is disposed on said printed circuit board and includes a resistive load; a rectifying circuit; and switch means for connecting one end of said second conductive path to said resistive load and the other end to said rectifying circuit, and for selectively reversing said connections.
Claim 5
Dependent Claim
55 words
The test instrument of claim 2 wherein: said circuit means is disposed on said printed circuit board and includes a resistive load; a rectifying circuit; and switch means for connecting one end of said second conductive path to said resistive load and the other end to said rectifying circuit, and for selectively reversing said connections.
References Cited (Backward Citations)
US3179884A
Cited
US3848189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |