EP1289061A2 - Antennensystem - Google Patents
Antennensystem Download PDFInfo
- Publication number
- EP1289061A2 EP1289061A2 EP02018747A EP02018747A EP1289061A2 EP 1289061 A2 EP1289061 A2 EP 1289061A2 EP 02018747 A EP02018747 A EP 02018747A EP 02018747 A EP02018747 A EP 02018747A EP 1289061 A2 EP1289061 A2 EP 1289061A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- antennas
- antenna system
- antenna
- circuit board
- metal plate
- 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- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- the invention relates to an antenna system for the reception of digital terrestrial Signals, in particular of DVB-T signals, according to the features of the generic term of claim 1.
- the invention is therefore based on the object of an antenna system for reception provide digital terrestrial signals that are small and inexpensive as well as the entire frequency range a constant gain with good adjustment exhibit.
- At least two antennas matched to ⁇ / 4 are interconnected via an adaptation network.
- the frequency range is uniform or uneven in corresponding Subdivisions divided. So the two antennas can be set to two smaller frequency ranges be tuned than would be the case with only a single antenna. Thereby results in the entire frequency range, in particular the UHF range (470 to 862 Megahertz), a constant gain with good adjustment, so that optimal reception properties are guaranteed.
- the optimal adaptation is achieved precisely by that the two antennas are tuned to ⁇ / 4 for their respective frequency range. It also enables portable, mobile reception.
- the two antennas are on the one hand with a ground connection and on the other hand connected via a coupling network. So that in the the corresponding frequency range, the resonance frequencies are optimally determined and the Antennas are dimensioned.
- the coupling network prevents the signals received by the two antennas can influence each other, and it is also achieved that the received signals add up optimally.
- At least one of the two antennas is, in particular are both antennas, loop-shaped.
- This loop shape for example in The shape of a semicircle or an upside down U has the advantage that the build two antennas compactly and, for example, stable and simple on one Housing can be attached.
- the compact design is an advantage portable antenna systems or portable television sets.
- one of the two antennas is loop-shaped and the other antenna designed as a rod antenna.
- the rod antenna is one towards the receiving frequency range tuned ⁇ / 4-rod, which at high frequencies is low-resistance, while at these frequencies the loop-shaped antenna is high impedance. The reverse relationship applies to low frequencies.
- the two antennas are arranged in one plane, one antenna being inside the other antenna.
- This also increases the Compactness of the antenna system, although it can still be remembered that Antenna system, d. H. the two antennas, with a housing or a protective layer to surround, so that the reception properties are not impaired, however, the stability of the antenna system increases.
- the housing or the layer surrounding the antennas e.g. a plastic coating
- the antenna system can be designed freely to give a visually appealing look. It can also be remembered to provide the two antennas with a metal layer (e.g. a chrome layer).
- the two antennas are arranged on a metal plate, which forms the ground connection for one connection of the antennas.
- the adaptation network including the connection cable, if applicable
- the Antennas decoupled.
- FIG. 1 shows an antenna system 1 which has two antennas 2 and 3.
- This Antennas 2 and 3 are loop-shaped, for example in the form of a semicircle, one upside down horseshoe or a U upside down.
- the two antennas 2 and 3 are connected to a ground connection 4, while the other ends each via a coupling network 5 or 6 to an adaptation network 7 are merged and the adaptation network 7 has an output A from which the signals received by the antenna system 1 are coupled out and be forwarded to the television receiver.
- the coupling network has that Task to transfer the signals of the antennas 2, 3 to an output without the antenna signals influence each other.
- the adaptation network serves to the respective dipole loops (complex impedances) on the characteristic impedance of for example transform 75 ⁇ .
- a broadband adjustment of greater than 10 dB is sufficient for relatively simple circuits. It is about here about L-C links.
- the dimensioning can also be calculated by simulation; the loop is determined using measurement technology (for example a Smith diagram).
- a coaxial cable is connected to the TV leads.
- Figure 2 shows a further embodiment of the antenna system in which the one antenna 3 again as a loop antenna and the further antenna as a rod antenna 8 is executed.
- the two coupling networks are omitted, so that one End of the antenna 2 and the rod antenna 8 connected to the matching network 7 is.
- FIG. 3 shows a further embodiment of the antenna system 1, implemented here again with two loop-shaped antennas 2 and 3.
- one Metal plate 9 available, the one hand the ground connection 4 for one end of each two antennas 2 and 3 forms, while the other two ends of antennas 2 and 3 are led to a printed circuit board 10 through the metal plate 9.
- On the circuit board 10 are electronic components, not shown, which at least that Form adaptation network 7. If the two antennas 2 and 3 are loop-shaped, are also the electronic components for the coupling networks 5 and 6 on the Printed circuit board 10. If the antenna system 1 is active, there is also a Amplifier on the printed circuit board 10.
- FIG. 1 is active, there is also a Amplifier on the printed circuit board 10.
- Metal plate 9 is separate from the circuit board 10
- a Top of the circuit board 10 is coated electrically conductive, this layer the Metal plate 9 forms or replaced. This eliminates z. B. the connecting lines of the ground connection 4 to the circuit board 10, so that the compactness of the design elevated.
- the circuit board 10 in a not shown Housing is arranged, preferably the metal plate 9 or in the event that the Top of the circuit board 10 replaces the metal plate 9, the top of the circuit board 10 at least partially, in particular completely, forms a housing wall.
- Such one Housing has the advantage that it can be used as a foot for setting up the antenna system 1 serves, while on the other hand the components of the antenna system 1, such as coupling network 5, 6, adaptation network 7, possibly amplifier, plug or socket of the Output A and possibly other components can be arranged in the housing can. It is also shown in Figure 3 that at the output A of the antenna system 1 a ferrite core 11 around the connection between the output A and a connection KA is arranged around for a coaxial cable. This suppresses jacket waves and thus significantly reducing the hand sensitivity of the antenna when adjusting.
- This Ferrite core 11 is also advantageously in the housing, so that a finished antenna consists of the housing as a stand, from which the two antennas 2 and 3 protrude in a correspondingly coordinated length, the housing still has a connection for a coaxial plug or a coaxial socket.
- FIG. 4 shows the position of the individual frequencies, in particular the lower frequency f 1 (such as 470 megahertz) and the position of the upper frequency f 2 (such as 862 megahertz).
- the figure shows an example of the position of the two resonance frequencies within the Frequency range between an upper and a lower frequency.
- Position of the two resonance frequencies symmetrically within the frequency range selected, an asymmetrical position is also possible.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
- Figur 1
- ein Antennensystem mit zwei schleifenförmigen Antennen,
- Figur 2
- ein Antennensystem mit einer schleifenförmigen und einer stabförmigen Antenne,
- Figur 3
- eine weitere Ausgestaltung des Antennensystems und
- Figur 4
- die Lage der Resonanzfrequenzen bei zwei Antennen.
Claims (10)
- Antennensystem (1) für den Empfang digitaler terrestrischer Signale, insbesondere von DVB-T-Signalen, dadurch gekennzeichnet, daß zumindest zwei auf λ/4 abgestimmte Antennen (2, 3) über ein Anpassungsnetzwerk (7) zusammengeschaltet sind.
- Antennensystem (1) nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Antennen (2, 3) einerseits mit einem Masseanschluß (4) und andererseits über ein Koppelnetzwerk (5, 6) verbunden sind.
- Antennensystem (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zumindest eine der beiden Antennen (2; 3), insbesondere beide Antennen (2, 3), schleifenförmig ausgebildet ist.
- Antennensystem (1) nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß eine der beiden Antennen (2) schleifenförmig und die andere Antenne (3) als Stabantenne (8) ausgebildet ist.
- Antennensystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Antennen (2, 3) in einer Ebene angeordnet sind und die eine Antenne (3) innerhalb der anderen Antenne (2) liegt.
- Antennensystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Antennen (2, 3) auf einer Metallplatte (9) angeordnet sind, die für jeweils einen Anschluß der Antennen (2, 3) den Masseanschluß (4) bildet.
- Antennensystem (1) nach Anspruch 6, dadurch gekennzeichnet, daß unterhalb der Metallplatte (9) eine Leiterplatte (10) angeordnet ist, die das Anpassungsnetzwerk (7) und gegebenenfalls auch das Koppelnetzwerk (5, 6) sowie einen Verstärker aufweist.
- Antennensystem (1) nach Anspruch 7, dadurch gekennzeichnet, daß eine Oberseite der Leiterplatte (10) elektrisch leitend beschichtet ist, wobei diese Schicht die Metallplatte (9) bildet bzw. ersetzt.
- Antennensystem (1) nach Anspruch 6, 7 oder 8, dadurch gekennzeichnet, daß die Leiterplatte (10) in einem Gehäuse angeordnet ist, wobei vorzugsweise die Metallplatte (9) bzw. die Oberseite der Leiterplatte (10) zumindest teilweise eine Gehäusewand bildet.
- Antennensystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an einem Ausgang A des Antennensystems (1) ein Ferritkern (11) um die Ableitungsverbindung herum angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10140682 | 2001-08-24 | ||
DE10140682 | 2001-08-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1289061A2 true EP1289061A2 (de) | 2003-03-05 |
EP1289061A3 EP1289061A3 (de) | 2004-10-06 |
Family
ID=7695960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02018747A Withdrawn EP1289061A3 (de) | 2001-08-24 | 2002-08-22 | Antennensystem |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1289061A3 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1515393A1 (de) * | 2003-09-11 | 2005-03-16 | Hirschmann Electronics GmbH & Co. KG | Zweibandantenne für den DVB-T-Empfang |
WO2005031910A2 (en) * | 2003-09-29 | 2005-04-07 | Nokia Corporation | Extension device |
WO2006068580A1 (en) * | 2004-12-21 | 2006-06-29 | Perlos Oyj | A tv antenna for a mobile terminal device |
US7084831B2 (en) | 2004-02-26 | 2006-08-01 | Matsushita Electric Industrial Co., Ltd. | Wireless device having antenna |
FR2889399A1 (fr) * | 2005-07-27 | 2007-02-02 | Archos Sa | Dispositif de television numerique terrestre portable comprenant un dispositif de reception d'un signal numerique de faible puissance |
FR2889398A1 (fr) * | 2005-07-27 | 2007-02-02 | Archos Sa | Dispositif de television numerique terrestre portable comprenant un dispositif de reception d'un signal numerique de faible puissance |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU5589873A (en) * | 1972-10-05 | 1974-11-21 | Antenna Eng Australia | Low-profile antennas low-profile antennas |
US4466003A (en) * | 1982-02-09 | 1984-08-14 | The United States Of America As Represented By The Secretary Of The Navy | Compact wideband multiple conductor monopole antenna |
JPH0669715A (ja) * | 1992-08-17 | 1994-03-11 | Nippon Mektron Ltd | 広帯域線状アンテナ |
WO1998044588A1 (en) * | 1997-03-31 | 1998-10-08 | Qualcomm Incorporated | Dual-frequency-band patch antenna with alternating active and passive elements |
JPH114113A (ja) * | 1997-04-18 | 1999-01-06 | Murata Mfg Co Ltd | 表面実装型アンテナおよびそれを用いた通信機 |
EP1100144A2 (de) * | 1999-11-10 | 2001-05-16 | Nippon Sheet Glass Co., Ltd. | Glasantenne für Fahrzeug |
DE20106005U1 (de) * | 2001-04-05 | 2001-08-30 | Receptec Gmbh | Antennenmodul, insbesondere für Frequenzen im GHz-Bereich zum Einsatz in Kraftfahrzeugen, vorzugsweise für einen Dualband- bzw. Multibandfunkbetrieb |
-
2002
- 2002-08-22 EP EP02018747A patent/EP1289061A3/de not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU5589873A (en) * | 1972-10-05 | 1974-11-21 | Antenna Eng Australia | Low-profile antennas low-profile antennas |
US4466003A (en) * | 1982-02-09 | 1984-08-14 | The United States Of America As Represented By The Secretary Of The Navy | Compact wideband multiple conductor monopole antenna |
JPH0669715A (ja) * | 1992-08-17 | 1994-03-11 | Nippon Mektron Ltd | 広帯域線状アンテナ |
WO1998044588A1 (en) * | 1997-03-31 | 1998-10-08 | Qualcomm Incorporated | Dual-frequency-band patch antenna with alternating active and passive elements |
JPH114113A (ja) * | 1997-04-18 | 1999-01-06 | Murata Mfg Co Ltd | 表面実装型アンテナおよびそれを用いた通信機 |
EP1100144A2 (de) * | 1999-11-10 | 2001-05-16 | Nippon Sheet Glass Co., Ltd. | Glasantenne für Fahrzeug |
DE20106005U1 (de) * | 2001-04-05 | 2001-08-30 | Receptec Gmbh | Antennenmodul, insbesondere für Frequenzen im GHz-Bereich zum Einsatz in Kraftfahrzeugen, vorzugsweise für einen Dualband- bzw. Multibandfunkbetrieb |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 018, Nr. 318 (E-1562), 16. Juni 1994 (1994-06-16) -& JP 06 069715 A (NIPPON MEKTRON LTD), 11. März 1994 (1994-03-11) * |
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 04, 30. April 1999 (1999-04-30) & JP 11 004113 A (MURATA MFG CO LTD), 6. Januar 1999 (1999-01-06) * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1515393A1 (de) * | 2003-09-11 | 2005-03-16 | Hirschmann Electronics GmbH & Co. KG | Zweibandantenne für den DVB-T-Empfang |
WO2005031910A2 (en) * | 2003-09-29 | 2005-04-07 | Nokia Corporation | Extension device |
WO2005031910A3 (en) * | 2003-09-29 | 2005-05-26 | Nokia Corp | Extension device |
US7761055B2 (en) | 2003-09-29 | 2010-07-20 | Nokia Corporation | Extension device |
US7084831B2 (en) | 2004-02-26 | 2006-08-01 | Matsushita Electric Industrial Co., Ltd. | Wireless device having antenna |
WO2006068580A1 (en) * | 2004-12-21 | 2006-06-29 | Perlos Oyj | A tv antenna for a mobile terminal device |
FR2889399A1 (fr) * | 2005-07-27 | 2007-02-02 | Archos Sa | Dispositif de television numerique terrestre portable comprenant un dispositif de reception d'un signal numerique de faible puissance |
FR2889398A1 (fr) * | 2005-07-27 | 2007-02-02 | Archos Sa | Dispositif de television numerique terrestre portable comprenant un dispositif de reception d'un signal numerique de faible puissance |
Also Published As
Publication number | Publication date |
---|---|
EP1289061A3 (de) | 2004-10-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69835540T2 (de) | Antennensystem für zirkular polarisierte funkwellen mit antennenmiltteln und interfacenetzwerk | |
DE69317235T2 (de) | Wenig Raum beanspruchende, breitbandige Antenne mit zugehörigem Sendeempfänger | |
DE60109608T2 (de) | Antenne und funkgerät mit einer derartigen antenne | |
DE69930407T2 (de) | Antenne | |
DE69118740T2 (de) | Mobile Antenne | |
EP0059927B1 (de) | Mikrowellen-Empfangseinrichtung | |
DE60108046T2 (de) | Doppeltwirkende Antenne | |
DE69617947T2 (de) | Gedruckte mehrband monopolantenne | |
EP0484454B1 (de) | Sende- und/oder empfangsanordnung für tragbare geräte | |
DE69521935T2 (de) | Funkantennen | |
DE3789161T2 (de) | Antenne für Gerät zur drahtlosen Nachrichtenübertragung. | |
DE69624300T2 (de) | Antenne | |
DE69623415T2 (de) | Doppel-helix antennensystem | |
DE19912465C2 (de) | Mehr-Bereichs-Antennenanlage | |
DE10223497A1 (de) | Dualbandantenne mit drei Resonatoren | |
WO2000036703A1 (de) | Halfloop-antenne | |
DE60128700T2 (de) | Drahtloses funkgerät | |
DE102004059648A1 (de) | Antenne | |
DE102006058934A1 (de) | Antennenvorrichtung und mobile Datenübertragungseinrichtung, welche diese verwendet | |
WO2002043182A1 (de) | Pifa-antennenvorrichtung für mobile kommunikationsendgeräte | |
DE19512003B4 (de) | Antenne für die Ausstrahlung und/oder den Empfang elektromagnetischer Signale, insbesondere Ultrahochfrequenzen, und Vorrichtung, welche eine derartige Antenne verwendet | |
DE112010000731T5 (de) | Interne fm-antenne | |
EP1289061A2 (de) | Antennensystem | |
EP1312136B1 (de) | Verkürzter schleifen-dipol und schleifen-monopol | |
DE2228043A1 (de) | Rundempfangsantenne |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
17P | Request for examination filed |
Effective date: 20041002 |
|
17Q | First examination report despatched |
Effective date: 20041109 |
|
AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20080731 |