DE4405628A1 - Portable HF transmitter with vertical rod antenna - Google Patents

Portable HF transmitter with vertical rod antenna

Info

Publication number
DE4405628A1
DE4405628A1 DE19944405628 DE4405628A DE4405628A1 DE 4405628 A1 DE4405628 A1 DE 4405628A1 DE 19944405628 DE19944405628 DE 19944405628 DE 4405628 A DE4405628 A DE 4405628A DE 4405628 A1 DE4405628 A1 DE 4405628A1
Authority
DE
Germany
Prior art keywords
transmitter
metal
metal band
belt
portable
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.)
Withdrawn
Application number
DE19944405628
Other languages
German (de)
Inventor
Josef Dipl Ing Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Priority to DE19944405628 priority Critical patent/DE4405628A1/en
Publication of DE4405628A1 publication Critical patent/DE4405628A1/en
Withdrawn legal-status Critical Current

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
    • H04B1/03—Constructional details, e.g. casings, housings
    • H04B1/034—Portable transmitters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Of Aerials (AREA)
  • Transceivers (AREA)

Abstract

The ends (7) of the carrying belt (3) are galvanically fastened to the metal housing (1) of the transmitter. The belt (3) is preferably made of a thin metal band such as silver. The metal band (4) may be arranged between two belt bands (5,6) such as plastics webbing strips. The metal band (4) pref. has a width of about 25 mm. and a length of 1 m. to 1.5 m. Metal fittings (7) may be provided at the ends of the belt (3). These may be rotatably fastened to the transmitter housing (1).

Description

Die Erfindung betrifft einen tragbaren Hochfrequenzsender mit vertikaler Stabantenne.The invention relates to a portable radio frequency transmitter with vertical rod antenna.

Bei solchen Sendern muß zur Erhöhung des Antennenwir­ kungsgrades eine möglichst gute Erdung des die Stabantenne tragenden Metallgehäuses erreicht werden. Zu diesem Zweck ist es bekannt, drei oder mehr Drähte sternförmig und horizontal vom Sender weg auszulegen (A. Christman, R. Radcliff: "Elevated Vertical Monopole Antennas = Effects of Changes in Radiator Hight and Readial Length" IEEE Transactions on Broadcasting, Vol. 36, Nr. 4, December 1990). Dies ist für tragbare Sender sehr umständlich.With such transmitters we have to increase the antenna degree of earthing of the rod antenna load-bearing metal housing can be achieved. To this end it is known to have three or more wires in a star shape to be laid out horizontally away from the transmitter (A. Christman, R. Radcliff: "Elevated Vertical Monopole Antennas = Effects of Changes in Radiator Hight and Readial Length "IEEE Transactions on Broadcasting, Vol. 36, No. 4, December 1990). This is very cumbersome for portable transmitters.

Es ist daher Aufgabe der Erfindung, eine für den Benutzer einfachere Einrichtung zur Erhöhung des Antennenwirkungs­ grades von tragbaren Hochfrequenzsendern mit vertikalen Stabantennen zu schaffen.It is therefore an object of the invention, one for the user simpler device for increasing the antenna effect degrees of portable radio frequency transmitters with vertical To create rod antennas.

Diese Aufgabe wird gelöst durch einen Traggurt aus Metall gemäß Hauptanspruch. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This task is solved by a metal carrying strap according to main claim. Advantageous further developments result itself from the subclaims.

Der aus einem Metallband oder Metalldrahtgeflecht bestehende Traggurt, mit dem der tragbare Sender vom Benutzer beispielsweise über der Schulter getragen wird, vergrößert im Betrieb (dann meist nicht mehr umgehängt, sondern mit abgestelltem Sender) die wirksame Erdkapazität des Sendergehäuses auf rund das Vierfache. Damit ist breitbandig ein Antennenwirkungsgrad von etwa 90% erzielbar.The one from a metal band or metal wire mesh existing shoulder strap with which the portable transmitter from  User is carried over the shoulder for example enlarged in operation (then mostly no longer transferred, but with the transmitter turned off) the effective earth capacity of the transmitter housing to around four times. So that is broadband antenna efficiency of around 90% achievable.

Die Erfindung wird im folgenden anhand einer schematischen Zeichnung an einem Ausführungsbeispiel näher erläutert.The invention is based on a schematic Drawing explained in more detail using an exemplary embodiment.

Fig. 1 zeigt einen üblichen tragbaren Hochfrequenz-Sender, der in einem Metallgehäuse 1 eingebaut ist und an dem eine vertikale Stabantenne 2 angebracht ist. Seitlich am Metallgehäuse 1 sind die Enden eines Traggurtes 3 befestigt, der aus einem Metallband 4 besteht, das gemäß dem vergrößerten Schnittbild zwischen zwei Gurtbändern 5 und 6 aus Nylon eingenäht ist. Das Metallband 4 ist an den Enden galvanisch mit Metallbeschlägen 7 verbunden, die ihrerseits drehbar über Bolzen 8 am Metallgehäuse 1 befestigt sind. Die Beschläge 7 bestehen vorzugsweise aus vernickeltem Messing, das Metallband 4 besitzt eine Breite von etwa 25 mm und ist als dünnes Silberband oder Geflecht ausgeführt, das zwischen zwei ca. 4 cm breiten Gurtbändern 5, 6 von etwa 1,4 bis 1,5 Meter Länge eingenäht ist. Fig. 1 shows a conventional portable radio frequency transmitter, which is installed in a metal housing 1 and to which a vertical rod antenna 2 is attached. The ends of a carrying strap 3 , which consists of a metal strap 4 , which is sewn according to the enlarged sectional view between two strap straps 5 and 6 made of nylon, are attached laterally to the metal housing 1 . The metal strip 4 is galvanically connected at the ends to metal fittings 7 , which in turn are fastened to the metal housing 1 via bolts 8 . The fittings 7 are preferably made of nickel-plated brass, the metal band 4 has a width of approximately 25 mm and is designed as a thin silver band or braid, which is between two approximately 4 cm wide belt bands 5 , 6 of approximately 1.4 to 1.5 meters Length is sewn in.

Claims (6)

1. Tragbarer Hochfrequenzsender mit vertikaler Staban­ tenne, gekennzeichnet durch einen Traggurt (3) aus Metall, dessen Enden (7) galvanisch an dem Metallgehäuse (1) des Senders befestigt sind.1. Portable high-frequency transmitter with vertical Staban tenne, characterized by a shoulder strap ( 3 ) made of metal, the ends ( 7 ) of which are galvanically attached to the metal housing ( 1 ) of the transmitter. 2. Sender nach Anspruch 1, dadurch gekennzeichnet, daß der Traggurt aus einem dünnen Metallband (4) insbesondere aus Silber besteht.2. Transmitter according to claim 1, characterized in that the carrying belt consists of a thin metal band ( 4 ), in particular made of silver. 3. Sender nach Anspruch 2, dadurch gekennzeichnet, daß das Metallband (4) zwischen zwei Gurtbändern (5, 6) insbesondere aus Kunststoff­ gewebe angeordnet ist.3. Transmitter according to claim 2, characterized in that the metal band ( 4 ) between two belt straps ( 5 , 6 ) in particular made of plastic fabric is arranged. 4. Sender nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Metallband (4) eine Breite von ca. 25 mm besitzt.4. Transmitter according to one of the preceding claims, characterized in that the metal band ( 4 ) has a width of approximately 25 mm. 5. Sender nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Traggurt (3) und das Metallband (4) eine Länge von 1 m bis 1,5 m besitzt.5. Transmitter according to one of the preceding claims, characterized in that the carrying belt ( 3 ) and the metal band ( 4 ) has a length of 1 m to 1.5 m. 6. Sender nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an den Traggurtenden Metallbeschläge (7) angebracht sind, die drehbar am Metallgehäuse (1) des Senders befestigt sind (Bolzen 8).6. Transmitter according to one of the preceding claims, characterized in that metal fittings ( 7 ) which are rotatably attached to the metal housing ( 1 ) of the transmitter (bolts 8 ) are attached to the strap ends.
DE19944405628 1994-02-22 1994-02-22 Portable HF transmitter with vertical rod antenna Withdrawn DE4405628A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944405628 DE4405628A1 (en) 1994-02-22 1994-02-22 Portable HF transmitter with vertical rod antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944405628 DE4405628A1 (en) 1994-02-22 1994-02-22 Portable HF transmitter with vertical rod antenna

Publications (1)

Publication Number Publication Date
DE4405628A1 true DE4405628A1 (en) 1995-08-24

Family

ID=6510867

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944405628 Withdrawn DE4405628A1 (en) 1994-02-22 1994-02-22 Portable HF transmitter with vertical rod antenna

Country Status (1)

Country Link
DE (1) DE4405628A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849129C (en) * 1950-09-30 1952-09-11 Heinrich Dr-Ing Scheller Carrying strap for radios
DE1807959U (en) * 1959-08-14 1960-03-17 Siemens Elektrogeraete Gmbh VHF DIPOLA ANTENNA FOR PORTABLE RADIO RECEIVERS.
DE1827055U (en) * 1960-12-09 1961-02-23 Paul Metz App Werke REMOTE CONTROL TRANSMITTER.
DE1968166U (en) * 1967-04-25 1967-09-14 Fritz Hellige & Co G M B H Fab ANTENNA FOR PORTABLE TELEMETRIC DEVICES.
DE2508926B2 (en) * 1975-03-01 1976-12-23 Standard Elektrik Lorenz Ag, 7000 Stuttgart RADIO TRANSMITTER / RECEIVER
US4430757A (en) * 1981-11-19 1984-02-07 Elphora Radioelectric signal trains generator and portable transmitter comprising such a generator
US4847818A (en) * 1988-10-31 1989-07-11 Timex Corporation Wristwatch radiotelephone
US5155861A (en) * 1990-11-14 1992-10-13 Priser Robert L Radio control transmitter holder
DE9408875U1 (en) * 1994-05-31 1994-09-01 GEV Gutkes Elektro Vertriebs GmbH, 30559 Hannover Device for monitoring infants

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849129C (en) * 1950-09-30 1952-09-11 Heinrich Dr-Ing Scheller Carrying strap for radios
DE1807959U (en) * 1959-08-14 1960-03-17 Siemens Elektrogeraete Gmbh VHF DIPOLA ANTENNA FOR PORTABLE RADIO RECEIVERS.
DE1827055U (en) * 1960-12-09 1961-02-23 Paul Metz App Werke REMOTE CONTROL TRANSMITTER.
DE1968166U (en) * 1967-04-25 1967-09-14 Fritz Hellige & Co G M B H Fab ANTENNA FOR PORTABLE TELEMETRIC DEVICES.
DE2508926B2 (en) * 1975-03-01 1976-12-23 Standard Elektrik Lorenz Ag, 7000 Stuttgart RADIO TRANSMITTER / RECEIVER
US4430757A (en) * 1981-11-19 1984-02-07 Elphora Radioelectric signal trains generator and portable transmitter comprising such a generator
US4847818A (en) * 1988-10-31 1989-07-11 Timex Corporation Wristwatch radiotelephone
US5155861A (en) * 1990-11-14 1992-10-13 Priser Robert L Radio control transmitter holder
DE9408875U1 (en) * 1994-05-31 1994-09-01 GEV Gutkes Elektro Vertriebs GmbH, 30559 Hannover Device for monitoring infants

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Legal Events

Date Code Title Description
8101 Request for examination as to novelty
8105 Search report available
8139 Disposal/non-payment of the annual fee