CH667955A5 - Transmitter for broadband antenna - has antenna as induction in parallel resonator stage coupled to transmitter coil - Google Patents
Transmitter for broadband antenna - has antenna as induction in parallel resonator stage coupled to transmitter coil Download PDFInfo
- Publication number
- CH667955A5 CH667955A5 CH1579/84A CH157984A CH667955A5 CH 667955 A5 CH667955 A5 CH 667955A5 CH 1579/84 A CH1579/84 A CH 1579/84A CH 157984 A CH157984 A CH 157984A CH 667955 A5 CH667955 A5 CH 667955A5
- Authority
- CH
- Switzerland
- Prior art keywords
- antenna
- transmitter
- frame
- resonant circuit
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
Description
BESCHREIBUNG DESCRIPTION
Zur Ausstrahlung der elektromagnetischen Felder sind besonders im Langwellen- oder Längstwellenbereich als Sendeantennen oft Rahmenantenne oder, ein Spezialfall von Rahmenantennen, Sendeschleifen verwendet. Die Rahmensendeantennen sind auf die Senderendstufen meistens mit einem Anpassungstranformator angeschlossen, Fig. 1. To transmit the electromagnetic fields, especially in the long-wave or long-wave range, loop antennas are often used as transmission antennas or, a special case of loop antennas, transmission loops. The frame transmission antennas are usually connected to the transmitter output stages with a matching transformer, FIG. 1.
Die magnetische Feldstärke des ausgestrahlten Feldes ist H = A. 1, wo A ist eine Konstante, welche von der verwendeten Sendespule, Wellenlänge und der Entfernung von der Rahmensendeantenne abhängig ist, I ist der durch die Rahmensendespule fliessende Erregungsstrom. The magnetic field strength of the emitted field is H = A. 1, where A is a constant which depends on the transmitter coil used, the wavelength and the distance from the frame transmitter antenna, I is the excitation current flowing through the frame transmitter coil.
Die Rahmensendeantennen haben allgemein und besonders in dem Lang- und Längstwellenbereich einen sehr schlechten Wirkungsgrad. The frame transmit antennas have a very poor efficiency in general and particularly in the long and long wave range.
Eine Steigerung der Feldstärke des ausgestrahlten magnetischen Feldes bei gleichbleibender Leistung der Senderendstufe wird mit der hier vorgeschlagenen Senderanordnung erreicht. An increase in the field strength of the emitted magnetic field with constant power of the transmitter output stage is achieved with the transmitter arrangement proposed here.
Die vorgeschlagene Schaltung kann in den Einrichtungen verwendet werden, wo breitbandige Eigenschaften der Rahmensendeantenne und eine ausgesprochen breitbandige Ausstrahlung des magnetischen Feldes nicht eine Bedingung ist. The proposed circuit can be used in the facilities where broadband properties of the frame transmitting antenna and an extremely broadband radiation of the magnetic field is not a requirement.
Das ausgestrahlte magnetische Feld wird nicht direkt oder mit dem transformierten Kollektorstrom der Senderendstufe, aber mit Zirkulationsstrom eines auf die Sendefrequenz abgestimmten Parallelresonanzkreises erregt. Die Rahmensendeantenne ist dabei entweder die ganze Induktivität oder mindestens ein Teil der Induktivität dieses Resonanzkreises. Dieser Resonanzkreis wird als Resonanzkreis der Rahmensendeantenne bezeichnet, Fig. 2. The emitted magnetic field is not excited directly or with the transformed collector current of the transmitter output stage, but with the circulation current of a parallel resonance circuit that is tuned to the transmission frequency. The frame transmitting antenna is either the entire inductance or at least part of the inductance of this resonant circuit. This resonance circuit is referred to as the resonance circuit of the frame transmit antenna, FIG. 2.
Der Zirkulationsstrom I ,rk eines Parallelresonanzkreises ist Izirk = Q I,1, wo Q ist der Gütefaktor des Resonanzkrei- ses The circulation current I, rk of a parallel resonance circuit is Icirc = Q I, 1, where Q is the quality factor of the resonance circuit
Rs ist der Verlustwiderstand des Resonanzkreises, und I ist der durch den Resonanzkreis fliessende Strom. Der Gütefaktor bestimmt hier auch die Übertragungsbandbreite, und sein Wert ist damit begrenzt. Rs is the loss resistance of the resonance circuit and I is the current flowing through the resonance circuit. The quality factor also determines the transmission bandwidth and its value is therefore limited.
In den Fällen, wo der Resonanzkreis der Rahmensendeantenne gleichzeitig der Kollektorresonanzkreis der Senderend stufe sein kann, ist Izirk = Q k,Ic, Fig. 3. In those cases where the resonance circuit of the frame transmission antenna can simultaneously be the collector resonance circuit of the transmitter end stage, Icirc = Q k, Ic, FIG. 3.
In den Fällen, wo ein geeigneter Kollektorresonanzkreis der Senderendstufe notwendig ist, dort kann der Resonanzkreis der Rahmensendeantenne entweder auf eine induktive Fig. 4, oder auf eine kapazitive Anzapfung Fig. 5 des Kollektorresonanzkreises angeschlossen werden. In cases where a suitable collector resonance circuit of the transmitter output stage is necessary, the resonance circuit of the frame transmitting antenna can either be connected to an inductive Fig. 4 or to a capacitive tapping Fig. 5 of the collector resonance circuit.
Der Resonanzkreis der Rahmensendeantenne kann auch auf eine sekundäre Koppelwicklung des Kollektorresonanzkreises angeschlossen werden und diese Koppelwicklung ist dann ein Teil der Induktivität des Resonanzkreises der Rahmensendeantenne, Fig. 6. The resonance circuit of the frame transmission antenna can also be connected to a secondary coupling winding of the collector resonance circuit and this coupling winding is then part of the inductance of the resonance circuit of the frame transmission antenna, FIG. 6.
Es ist auch eine Schaltungsvariante möglich, wo die Primärwicklung Lc im dem Kollektorkreis nicht abgestimmt ist, Fig. A circuit variant is also possible where the primary winding Lc in the collector circuit is not matched, Fig.
7. Der Resonanzkreis der Rahmensendeantenne kann sich auch in dem Emitterkreis der Senderendstufe befinden, Fig. 8. 7. The resonance circuit of the frame transmission antenna can also be located in the emitter circuit of the transmitter output stage, FIG. 8.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1579/84A CH667955A5 (en) | 1984-03-29 | 1984-03-29 | Transmitter for broadband antenna - has antenna as induction in parallel resonator stage coupled to transmitter coil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1579/84A CH667955A5 (en) | 1984-03-29 | 1984-03-29 | Transmitter for broadband antenna - has antenna as induction in parallel resonator stage coupled to transmitter coil |
Publications (1)
Publication Number | Publication Date |
---|---|
CH667955A5 true CH667955A5 (en) | 1988-11-15 |
Family
ID=4213716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1579/84A CH667955A5 (en) | 1984-03-29 | 1984-03-29 | Transmitter for broadband antenna - has antenna as induction in parallel resonator stage coupled to transmitter coil |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH667955A5 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9301541A (en) * | 1993-09-06 | 1995-04-03 | Nedap Nv | Antenna for electromagnetic detection system. |
EP1160915A3 (en) * | 2000-05-30 | 2004-12-01 | Mitsubishi Materials Corporation | Antenna device of interrogator |
-
1984
- 1984-03-29 CH CH1579/84A patent/CH667955A5/en not_active IP Right Cessation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9301541A (en) * | 1993-09-06 | 1995-04-03 | Nedap Nv | Antenna for electromagnetic detection system. |
EP0646984A1 (en) * | 1993-09-06 | 1995-04-05 | N.V. Nederlandsche Apparatenfabriek NEDAP | Electromagnetic detection system provided with an antenna element having one winding |
EP1160915A3 (en) * | 2000-05-30 | 2004-12-01 | Mitsubishi Materials Corporation | Antenna device of interrogator |
US6963729B2 (en) | 2000-05-30 | 2005-11-08 | Mitsubishi Materials Corporation | Antenna device of interrogator |
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Legal Events
Date | Code | Title | Description |
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PL | Patent ceased |