EP1247310A1 - Funk-sende-/funk-empfangseinrichtung mit abstimmbarer antenne - Google Patents
Funk-sende-/funk-empfangseinrichtung mit abstimmbarer antenneInfo
- Publication number
- EP1247310A1 EP1247310A1 EP00989808A EP00989808A EP1247310A1 EP 1247310 A1 EP1247310 A1 EP 1247310A1 EP 00989808 A EP00989808 A EP 00989808A EP 00989808 A EP00989808 A EP 00989808A EP 1247310 A1 EP1247310 A1 EP 1247310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radio
- dielectric
- dielectric body
- transmission
- electrically active
- 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.)
- Granted
Links
Classifications
-
- 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
- H01Q9/06—Details
- H01Q9/14—Length of element or elements adjustable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
-
- 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
- H01Q9/32—Vertical arrangement of element
Definitions
- the invention relates to a radio transceiver with tunable antenna according to the preamble of claim 1.
- messages for example voice, image information or other data
- the electromagnetic waves are radiated by antennas, the carrier frequencies being in the frequency band provided for the respective system.
- antenna systems which consist of several antennas, each of which covers a specific frequency range.
- a disadvantage of such antenna systems is on the one hand the increased space requirement and on the other hand a suboptimal adaptation solution of the antennas to the individual frequencies from the respective frequency band.
- a disadvantage of such systems is the wear of mechanically loaded movable components (adjusting means) and the associated increased probability of failure.
- the object on which the invention is based is to design a radio transceiver in such a way that, when covering a large frequency range, it ensures an almost constant stable antenna gain.
- the radio transceiver according to the invention has a first electrically active antenna body, in the close range of which a dielectric body is arranged, close range means that the dielectric body to the antenna body with respect to wavelengths from a for mobile radio -Sender- / radio receiving device allowable wavelength range has a distance such that the phase run resulting from the distance do not produce any radiation characteristics changed compared to the desired radiation characteristics.
- the dielectric body is designed in such a way that its dielectric is changed on the basis of at least one control signal which is generated by a control device as the output signal can.
- the control signal is generated by the control device until a dielectric body of the dielectric body, which has an optimal value of at least one physical, a function of the transmission / reception quality of the radio transmission / radio reception device, is established by the configuration of this dielectric body representing, guaranteed size, which is detected by detection means and forwarded to the control device, as an input signal, an optimal value, which can be predetermined or limited in particular by the dimensioning of the electronic components of the radio transceiver , then it is given if the value of the physical quantity representing a function of the transmission / reception quality of the radio transmission / radio reception device allows the conclusion that the transmission / reception quality - in particular within the scope of the possibility given by the dimensioning - is maximal is.
- the main advantage of the mobile radio transceiver according to the invention is a largely stable antenna gain in a large frequency range, which by regulating to an optimum value of the quantity (s) representing the reception quality by means of variation of the dielectric of the dielectric body in the close range, i.e. is achieved in the immediate vicinity of the antenna body, with neither the antenna (the antenna body) nor the dielectric body having to be moved, which reduces the required space and manufacturing costs.
- An essential advantage of the development according to claim 2 is the cost-effective implementation of the dielectric body with changeable dielectric, since ferromagnetic domains experience a change in the dielectric of the dielectric body with them through an external direct voltage field which is generated using the first
- the development according to claim 3 enables the first layer to be protected from external influences, but it can also fix the first layer in particular if the first layer is an electrolyte.
- a major advantage of the development according to claim 4 is the high dielectric constant that ceramic has, since the frequency range in which the antenna can be tuned and used can grow proportionally with the dielectric constant of the hollow body used and the acquisition costs are low because ceramic bodies , in particular with ferromagnetic domains, are produced in large numbers, for example as bodies for resonators and capacitors.
- a major advantage of the development according to claim 5 is the minimization of undirected external influences, since these have a greater impact the greater the electrically effective antenna length of an antenna.
- a significant advantage of the development according to claim 6 is the minimization of a directed electrical influence on the antenna by the user, in particular his head and hands, the radio transmitter / radio receiver device and vice versa.
- the main advantage of the development according to claim 10 is the possible use of the mobile radio transceiver in a frequency range in which the ratio of the highest to the lowest frequency is at least 1.5 octaves.
- the detection of the leading transmission power or returning transmission power according to claim 11 as a physical quantity representing a function of the transmission / reception quality of the radio transmission / radio reception device enables the regulation (adaptation) of the antenna to be implemented easily, since in the Radio transmitters / radio receivers can use existing means.
- the development according to claim 12 realizes a filter, for example a helix filter, which enables tuning of an antenna within a large frequency range without having to change the structure of the antenna.
- FIGURE 1 Mobile radio transceiver with rod antenna, in which a dielectric body designed as a rod is arranged parallel to the antenna, the dielectric of the dielectric body varies by a DC voltage supplied via a circuit of the rod antenna can be.
- FIGURE 2 Mobile radio transceiver with
- Rod antenna which is enclosed by a dielectric body designed as a hollow cylinder (in a sectional view), the dielectric of the dielectric body being able to be varied by means of a direct voltage supplied via a circuit of the rod antenna.
- FIGURE 1 shows a mobile radio transmission / radio reception device SE with a transmission / reception antenna designed as a rod antenna SA, a maximum radio-technically effective antenna length l max being determined by the length of the rod antenna SA.
- a dielectric body designed as a rod SB is arranged parallel to the longitudinal axis of the rod antenna SA.
- the spacing of the rod SB should not be too great in relation to the wavelength, since the different phase delays that otherwise occur result in a different radiation characteristic than the radiation characteristic customary for rod antennas (monopole antennas).
- the wavelengths permitted for the radio transmitter / radio receiver device result (via the known frequency-wavelength-light velocity relationship) from frequencies contained in the frequency range to be covered by the antenna SA.
- the dielectric body SB can have any other geometric shape. It is only essential that the dielectric body SB is located in the near field of the antenna, the antenna being detuned by varying the dielectric constant of the dielectric body SB so that it is tuned to the current frequency. How the geometric shape is to be selected depends in particular on the antenna or its shape and can be determined, for example, by simulation or by experimental setups.
- the frequency range covered is greater the greater the interval of the adjustable dielectric of the dielectric body SB, the dielectric body SB having to have a very high dielectric constant (preferably ⁇ r approx. 200) in the idle state - i.e. there is no DC voltage field , which can be ensured in particular by using a dielectric body SB with a high dielectric constant and / or by increasing the volume of the dielectric body SB to be used.
- a very high dielectric constant preferably ⁇ r approx. 200
- the dielectric body SB must be made of ceramic, for example, since ceramics, in particular those with ferromagnetic domains, can be produced with a required high dielectric constant of, for example, ⁇ r approx. 200.
- the dielectric rod SB is made of ceramic and has so-called. Ferromagnetic domains, ie the ceramic is designed in such a way that it has areas with atomic magnetic dipoles that can be aligned parallel or spontaneously or due to external electrical influence, so that magnetic domains arise. Since ferromagnetic domains are susceptible to electrical influences, an applied DC voltage field has an influence on the dielectric of the dielectric rod SB. In order to be able to expose the dielectric rod SB with the ferromagnetic domains to a DC voltage field, the dielectric rod SB is covered with an electrically conductive first layer S1, which, however, does not influence an alternating electrical field, for example radiation from the antenna.
- the DC voltage field required to influence the dielectric is achieved by applying a DC voltage U S ⁇ to the rod antenna SA in such a way that the rod antenna SA forms a pole of the electrical DC voltage field and the first layer S1 forms the second pole - opposite pole - of the electrical DC voltage field, the first layer S1 via a high-resistance resistor R1 - resistance value which is much larger than 50 ⁇ - with an electrical zero potential - ground - is connected.
- the high first resistance ensures that transmission / reception signals can be transmitted or received unhindered via the rod antenna SA, despite the dielectric body covered with a conductive material, which is located in the near field of the rod antenna SA.
- the voltage U s ⁇ can be applied , for example, jointly via an RF connection, which is necessary for the transmission of an RF signal, with a circuit EN, for example a series connection, for decoupling between the RF connection and a connection for the DC voltage U ST a second resistor R2 and a first coil SP1 is provided.
- a circuit EN for example a series connection, for decoupling between the RF connection and a connection for the DC voltage U ST a second resistor R2 and a first coil SP1 is provided.
- a second layer ⁇ 2 protects the first layer S1, in particular from external influences, but, especially if the material of the first layer is an electrolyte, is also a device which prevents this material from penetrating outside.
- the second layer S2 should have a very small dielectric constant, which has a dielectric behavior that is at least almost neutral.
- the DC voltage U S ⁇ is a signal (control signal) present at the output of a control unit (microprocessor) ⁇ P, whose Amount, sign and / or signal duration depends on the input variable EQ applied to the control unit ⁇ P.
- the control unit ⁇ P controls or varies the dielectric through the direct voltage U S ⁇ until a physical input variable EQ representing the reception quality of the radio transceiver SE has reached an ideal value (optimum).
- the DC voltage U s ⁇ is brought to the rod antenna by means of decoupling EN, so that an electrical charge is stored on the surface of the rod antenna and, with the first layer connected to the zero potential, as counter pole, generates a DC voltage field that the dielectric of the dielectric body changed.
- the surface of the rod antenna SA must therefore also be dimensioned such that an electrical charge necessary for generating the DC voltage field can be stored.
- the dimensioning of the individual physical quantities (dielectric at rest, surface of the antenna, etc.) of the circuit can be determined, for example, by means of circuit simulation and optimized after using a prototype.
- a DC voltage U S ⁇ is generated, which generates a predetermined value of the dielectric to be set (default value) and increases this value continuously, so that the dielectric also changes continuously. If the evaluation shows that the input variable EQ moves away from the ideal value, the DC voltage value U ST / until the input variable EQ has reached the ideal value.
- control unit ⁇ P receives the control unit ⁇ P from means EFM for the acquisition of physical input variables EQ dependent on the overlap dimension M, which are transformed by these means into a form necessary for the control unit ⁇ P.
- the means EFM also detect several physical input variables EQ and, if necessary, prepare them before they are forwarded to the control unit ⁇ P, the control unit ⁇ P correspondingly checking several input variables for reaching an ideal value.
- FIG. 2 shows a mobile radio transceiver SE with a transmission / reception antenna designed as a rod antenna SA, a maximum radio-effective antenna length l max being determined by the length of the rod antenna SA.
- a dielectric body HK configured as a hollow body is arranged symmetrically to the longitudinal axis of the rod antenna SA such that the longitudinal axis of the rod antenna SA coincides with the longitudinal axis of the dielectric hollow body HK.
- the diameter of the hollow body HK should be chosen so that the side walls of the hollow body are not too far apart in relation to the wavelength, since the different phase delays that occur otherwise result in a different radiation characteristic compared to the radiation characteristic usual for rod antennas (monopole antennas).
- the hollow body has ferromagnetic domains and is likewise covered with a first layer S1 and a second layer S2.
- This voltage U S ⁇ is a signal (control signal) present at the output of a control unit (microprocessor) ⁇ P, the magnitude, sign and / or signal duration of which depends on the input variable EQ present at the control unit ⁇ P.
- the input variable EQ is determined by the means of registration provided.
- These detection means EFM can be designed in such a way that they have a directional coupler RK, which decouples a leading transmission power and a returning transmission power from a transmission signal (this configuration of the detection means can also be carried out in the embodiment of the invention described in FIG. 1).
- the leading transmission power is then first rectified by a first rectifier and the rectified leading transmission power is then converted into a first digital signal by a first analog / digital converter.
- the returning transmission power is rectified by a second rectifier and the rectified returning transmission power is then converted by a second analog / digital converter into a second digital signal.
- the digital signals are present as an input signal on the control unit ⁇ P, the control unit ⁇ P being designed, for example, as a (micro) processor with associated software.
- the processor ⁇ P checks whether the signals are at an ideal value for the digital signals present - no return current transmission power or minimum returning transmission power and maximum forward transmission power - have reached.
- the processor ⁇ P first increases the value of the current DC voltage U s ⁇ continuously, for example, so that the dielectric of the hollow body changes, in particular based on the default value.
- the processor checks the input signals changed by this process - forward and returning transmission power - which are applied to the processor with regard to the ideal values to be achieved. If the values of the signals - forward and returning transmission power - have deteriorated with a view to reaching the ideal values, the value of the direct voltage U ST is reduced, for example continuously,. This can even lead to the reversal of the sign of the signal U s ⁇ .
- the DC voltage U S ⁇ is generated until the dielectric changed by the DC voltage field resulting from the DC voltage U s ⁇ ensures that the forward and returning transmission power have reached their ideal values.
- Mobile radio transceivers have been described above, in particular because the invention is used particularly advantageously in mobile radio transceivers, in particular by reducing weight, saving space, etc., but the invention is not only in the case of mobile radio Transmitter / radio receiving devices are advantageous but also with radio transceiver devices.
Landscapes
- Transceivers (AREA)
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Support Of Aerials (AREA)
- Waveguide Aerials (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19959983A DE19959983C2 (de) | 1999-12-13 | 1999-12-13 | Funk-Sende-/Funk-Empfangseinrichtung mit abstimmbarer Antenne |
DE19959983 | 1999-12-13 | ||
PCT/DE2000/004225 WO2001045203A1 (de) | 1999-12-13 | 2000-11-28 | Funk-sende-/funk-empfangseinrichtung mit abstimmbarer antenne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1247310A1 true EP1247310A1 (de) | 2002-10-09 |
EP1247310B1 EP1247310B1 (de) | 2003-06-18 |
Family
ID=7932425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00989808A Expired - Lifetime EP1247310B1 (de) | 1999-12-13 | 2000-11-28 | Funk-sende-/funk-empfangseinrichtung mit abstimmbarer antenne |
Country Status (6)
Country | Link |
---|---|
US (1) | US6781562B1 (de) |
EP (1) | EP1247310B1 (de) |
CN (1) | CN1210840C (de) |
AT (1) | ATE243371T1 (de) |
DE (2) | DE19959983C2 (de) |
WO (1) | WO2001045203A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE517845C2 (sv) * | 2000-12-05 | 2002-07-23 | Ericsson Telefon Ab L M | Ett antennarrangemang och en kommunikationsanordning som innefattar ett sådant arrangemang |
WO2004073108A1 (ja) * | 2003-02-14 | 2004-08-26 | Kabushiki Kaisha Toshiba | 電子機器 |
US6992628B2 (en) * | 2003-08-25 | 2006-01-31 | Harris Corporation | Antenna with dynamically variable operating band |
US7084828B2 (en) * | 2003-08-27 | 2006-08-01 | Harris Corporation | Shaped ground plane for dynamically reconfigurable aperture coupled antenna |
JP2007293714A (ja) * | 2006-04-26 | 2007-11-08 | Toshiba Tec Corp | 無線通信装置及び印刷装置 |
US8742991B2 (en) * | 2012-04-10 | 2014-06-03 | Htc Corporation | Handheld electronic devices and methods involving tunable dielectric materials |
US11469502B2 (en) * | 2019-06-25 | 2022-10-11 | Viavi Solutions Inc. | Ultra-wideband mobile mount antenna apparatus having a capacitive ground structure-based matching structure |
DE102019210054A1 (de) * | 2019-07-09 | 2021-01-14 | Robert Bosch Gmbh | Antenne und Verfahren zum Betreiben einer Antenne |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE550040A (de) * | 1956-04-26 | |||
GB1157971A (en) | 1965-08-28 | 1969-07-09 | Telefunken Patent | Aerial System for an Earth Satellite |
JPS61169003A (ja) | 1985-01-21 | 1986-07-30 | Mitsubishi Electric Corp | アンテナ装置 |
JPH0374909A (ja) * | 1989-08-16 | 1991-03-29 | Nissan Motor Co Ltd | 電子制御アンテナ装置 |
US6067047A (en) | 1997-11-28 | 2000-05-23 | Motorola, Inc. | Electrically-controllable back-fed antenna and method for using same |
US6496147B1 (en) * | 1998-12-14 | 2002-12-17 | Matsushita Electric Industrial Co., Ltd. | Active phased array antenna and antenna controller |
DE19919107A1 (de) * | 1999-04-27 | 2000-11-16 | Siemens Ag | Mobile Funk-Sende-/Funk-Empfangseinrichtung mit abstimmbarer Antenne |
US6300894B1 (en) * | 1999-07-09 | 2001-10-09 | Harris Corporation | Antenna having electrically controllable radar cross-section |
DE19943118A1 (de) * | 1999-09-09 | 2001-04-05 | Siemens Ag | Mobile Funk-Sende-/Funk-Empfangseinrichtung mit abstimmbarer Antenne |
-
1999
- 1999-12-13 DE DE19959983A patent/DE19959983C2/de not_active Expired - Fee Related
-
2000
- 2000-11-28 WO PCT/DE2000/004225 patent/WO2001045203A1/de active IP Right Grant
- 2000-11-28 DE DE50002621T patent/DE50002621D1/de not_active Expired - Lifetime
- 2000-11-28 US US10/149,231 patent/US6781562B1/en not_active Expired - Fee Related
- 2000-11-28 AT AT00989808T patent/ATE243371T1/de not_active IP Right Cessation
- 2000-11-28 CN CNB008171149A patent/CN1210840C/zh not_active Expired - Fee Related
- 2000-11-28 EP EP00989808A patent/EP1247310B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0145203A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2001045203A1 (de) | 2001-06-21 |
CN1421058A (zh) | 2003-05-28 |
US6781562B1 (en) | 2004-08-24 |
DE50002621D1 (de) | 2003-07-24 |
DE19959983A1 (de) | 2001-07-05 |
CN1210840C (zh) | 2005-07-13 |
ATE243371T1 (de) | 2003-07-15 |
DE19959983C2 (de) | 2002-05-02 |
EP1247310B1 (de) | 2003-06-18 |
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