WO2014137194A1 - 무선 주파수 필터 - Google Patents
무선 주파수 필터 Download PDFInfo
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- WO2014137194A1 WO2014137194A1 PCT/KR2014/001909 KR2014001909W WO2014137194A1 WO 2014137194 A1 WO2014137194 A1 WO 2014137194A1 KR 2014001909 W KR2014001909 W KR 2014001909W WO 2014137194 A1 WO2014137194 A1 WO 2014137194A1
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- 238000001914 filtration Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 53
- 230000005540 biological transmission Effects 0.000 description 50
- 238000009434 installation Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
- H01P1/2136—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using comb or interdigital filters; using cascaded coaxial cavities
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
Definitions
- the present invention relates to a radio frequency filter used in a wireless communication system, and more particularly, to a radio frequency filter for having a cavity structure such as a cavity filter.
- a radio frequency filter in particular a radio frequency filter having a cavity structure, is used for processing transmission and reception radio signals in a wireless communication system, and is particularly representatively applied to a base station or a repeater in a mobile communication system.
- a radio frequency filter having a cavity structure generally includes a plurality of accommodation spaces such as a rectangular parallelepiped, or a cavity structure, through a metal housing, and includes a dielectric resonance element (DR) or a metal resonance rod inside each cavity structure.
- DR dielectric resonance element
- Each of the configured resonating elements is provided to generate an ultra high frequency resonance.
- One resonator stage is formed for each cavity, and a plurality of resonator stages generally have a multi-stage structure sequentially connected to each cavity.
- a cover for shielding the open surface of the cavity structure is provided on the upper part of the cavity structure, and the cover is a tuning structure for tuning the filtering characteristics of the radio frequency filter.
- a tuning screw and a nut for fixing the tuning screw can be installed.
- a radio frequency filter having a cavity structure Japanese Patent Application Laid-Open No. 10-2004-100084 (name: "Radio Frequency Filter”) published by the present applicant, published on December 02, 2004, the inventor: Park Jong-Kyu, Sang-Sik Park, Seung-Taek Jung) are examples.
- the base station system has been installed at the time of initial installation, in consideration of the frequency band to be further processed in the future, additionally install the necessary equipment or implement the operating performance of each equipment is increasing.
- the antenna radiating element may be configured as a broadband radiating element in consideration of the current processing frequency band (for example, 800 MHz) as well as a frequency band (for example, 700 MHz) to be added later.
- an aspect of the present invention is to provide a radio frequency filter capable of expanding a filtering band and maintaining good filtering characteristics for signal processing of an existing filtering band and an additionally expanding filtering band.
- Another object of the present invention is to provide a radio frequency filter that can more efficiently save installation cost and installation space, and can have a structure that can extend the filtering band.
- the present invention provides a radio frequency filter; A first filter unit for filtering a signal of a first frequency band which is a fundamental frequency band; A second filter unit for filtering a signal of a second frequency band which is an additional frequency band added together with the basic frequency band; And a switching unit having a structure for extinguishing or maintaining the resonance function of the resonance stage by connecting or blocking at least one resonance stage from the resonance stage (s) constituting the second filter unit with the ground terminal.
- the second filter unit has a structure in which a plurality of resonant stages are sequentially connected in multiple stages, and the switching unit is configured to connect the second resonant stage or the third resonant stage with the ground terminal.
- the second filter portion has a cavity structure;
- the switching unit includes: a switching terminal having a switching pin which is designed to be movable into and out of the cavity, and is electrically connected to a resonating element when being drawn into the cavity and connects the resonating element to a ground terminal; And a driver for moving the switching pin by an external control signal.
- the resonating element may be a resonating element in the form of a metal rod;
- the switching pin may be made of a metal material, and may have a structure in which the switching pin is in direct contact with the upper end of the resonating element and connected to the ground terminal when the inside of the cavity is inserted into the cavity.
- the switching terminal the elastic body for providing a restoring force for restoring the switching pin to the initial position; And a case surrounding and supporting the switching pin and the elastic body as a whole.
- the case is coupled to and installed in a through hole provided in a cover that partially forms the cavity.
- the resonant element may be a dielectric resonant element;
- the switching pin may be configured of a ferrite component, and may be configured to be disposed close to the upper end of the resonating element when it is drawn into the cavity to dissipate the resonance function.
- the radio frequency filter according to the present invention can expand the filtering band, and can maintain the filtering characteristics for each of the signal processing of the existing filtering band and the additionally expanded filtering band, and also, the installation cost and installation Space can be saved more efficiently.
- FIG. 1A and 1B are schematic block diagrams of a radio frequency filter according to embodiments of the present invention.
- FIGS. 2A through 2C are schematic internal structural diagrams of a radio frequency filter having a cavity structure according to embodiments of the present invention.
- FIG. 3 is a circuit diagram of a radio frequency filter according to a first embodiment of the present invention.
- FIG. 4 is a waveform diagram illustrating filtering characteristics in an exemplary operation of FIG. 3.
- FIG. 5 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 3.
- FIG. 6 is a circuit diagram of a radio frequency filter according to a second embodiment of the present invention.
- FIG. 7 is a waveform diagram illustrating filtering characteristics in the example operation of FIG. 6.
- FIG. 8 is a circuit diagram of a radio frequency filter according to a third embodiment of the present invention.
- FIG. 9 is a waveform diagram illustrating filtering characteristics in the example operation of FIG. 8.
- FIG. 10 is a circuit diagram of a radio frequency filter according to a fourth embodiment of the present invention.
- FIG. 11 is a waveform diagram illustrating filtering characteristics in an exemplary operation of FIG. 10.
- FIG. 12 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 10.
- FIG. 13 is a circuit diagram of a radio frequency filter according to a fifth embodiment of the present invention.
- FIG. 14 is a waveform diagram illustrating filtering characteristics in an exemplary operation of FIG. 13.
- FIG. 15 is a circuit diagram of a radio frequency filter according to a sixth embodiment of the present invention.
- FIG. 16 is a waveform diagram illustrating filtering characteristics in the example operation of FIG. 15.
- 17 is a circuit diagram of a radio frequency filter empirically implemented for comparison with the present invention and embodiments.
- FIG. 18 is a waveform diagram illustrating filtering characteristics in the example operation of FIG. 17.
- FIG. 19 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 17.
- 20 is a circuit diagram of a radio frequency filter according to a seventh embodiment of the present invention.
- FIG. 21 is a waveform diagram illustrating filtering characteristics in an exemplary operation of FIG. 20.
- FIG. 22 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 20.
- FIG. 23 is a first exemplary structural diagram of a switching terminal that can be applied to a switching unit of embodiments of the present invention.
- FIG. 24 is a first exemplary structural diagram of a driver and associated filter main part for driving the switching terminal of FIG.
- 25 is a second exemplary structural diagram of a driver and associated filter main part for driving the switching terminal of FIG.
- 26A and 26B are third exemplary structural diagrams of a driver for driving the switching terminal of FIG. 23 and an associated filter main part;
- FIG. 27 is a second exemplary structural diagram of a main part of a switching terminal and an associated filter applicable to the switching part of the embodiments of the present invention
- a radio frequency filter 10 includes a first transmission / reception filter unit for filtering a signal of a first frequency band (for example, an 800 MHz band) that is a fundamental frequency band. (Tx1, Rx1); And a second transmission / reception filter unit (Tx2, Rx2) for filtering the signal of the second frequency band (for example, 700MHz band) which is an additional frequency band added in addition to the basic frequency band.
- the radio frequency filter 10 shown in FIG. 1B has a logical configuration identical to that of the radio frequency filter 10 shown in FIG. 1A, but is expressed differently similarly to the actual product structure.
- the transmission signal is amplified by the high power amplifier (AMP) and provided to the radio frequency filter 10 so that the transmission band is filtered and then output to the antenna ANT side.
- the signal received through the antenna ANT is provided to the radio frequency filter 10, the reception band is filtered, then provided to the low noise amplifier (LNA) and amplified.
- LNA low noise amplifier
- the radio frequency filter 10 can be basically set to perform an operation of filtering only a transmission / reception signal of a first frequency band (at the time of initial installation), in which case the first transmission / reception filter unit Tx1, Rx2
- the internal path is set such that the transmit / receive signal is provided only by.
- the signal processing of the second frequency band is further required, it is set to perform an operation of filtering the transmission / reception signal of the second frequency band as well as the signal of the first frequency band.
- the internal path is set such that the transmission / reception signal is provided to both the first transmission / reception filter unit Tx1 and Rx1 and the second transmission / reception filter unit Tx2 and Rx2.
- the transmission signal and the reception signal are distinguished, and the transmission signal is provided to the first and second transmission filter units Tx1 and Tx2, and the reception signal is provided to the first and second reception filter units Rx1 and Rx2. Is provided.
- the signals filtered by the first and second transmission filter units Tx1 and Tx2 are then combined and provided to the antenna ANT, and the signals filtered by the first and second reception filter units Rx1 and Rx2 are then combined. It is provided by a low noise amplifier (LNA).
- LNA low noise amplifier
- the second transmission / reception filter unit Tx2 in order to set a path such that the transmission / reception signal provided to the first transmission / reception filter unit Tx1 and Rx1 is further provided to the second transmission / reception filter unit Tx2 and Rx2, the second transmission / reception filter unit Tx2, A configuration having a switching unit (not shown) for connecting or disconnecting signal paths (a and b of FIG. 1A) connected to the Rx2) side by an external control signal may be considered.
- a general switch structure is substantially easy to implement in a radio frequency filter for filtering a multi-band signal while having a substantially cavity structure (as described below), and also simply switches on / off a signal line.
- the structure adversely affects the filtering characteristics (as described below). This is also a significant factor in that a radio frequency filter for filtering a multi-band signal having a cavity structure is implemented in a filter combiner / divider method in actual product implementation.
- the first and second transmission filter units Tx1 and Tx2 having a cavity structure have respective housings, and after their separate input / output ports are formed, their input / output ports are formed.
- a filter combiner / divider structure similar to that of a duplexer, multiplexer, etc. may be implemented as a structure in which both filter units are coupled to each other for lossless coupling and distribution of a transmission signal. have.
- the signal input to one port P1 is distributed to the first transmission filter unit Tx1 or the second transmission filter unit Tx2, respectively, inside the filter, processed, and then combined again at one port P2. It has a structure.
- Korean Patent Publication No. 10-2008-0114104 (name: "filter combiner / divider”) filed by the present applicant, inventors: Sangsik Park, Myunghoon Yang, published Sun: December 31, 2008).
- the signal path connected to the second transmission filter unit Tx2 side is a general solenoid driving method. It can be seen that it is quite difficult to install a switching unit having a switch structure of.
- the switching unit in implementing the switching unit, at least one resonant stage among the plurality of resonant stages constituting the second transmission filter unit Tx2 for filtering the second frequency band signal, which is an additional frequency band, is grounded.
- the switching unit is configured in such a way that the resonant function of the resonant stage is extinguished or maintained by connecting to or blocking the stage.
- FIG. 2A to 2C are schematic internal structural diagrams of a radio frequency filter having a cavity structure according to embodiments of the present invention
- FIG. 2A is a combiner type having two paths
- FIG. 2B is a duplexer type
- FIG. The structure of the combiner type having four paths is shown.
- the structure shown in FIG. 2A may similarly correspond to only the structures of the first and second transmission filter units Tx1 and Tx2 among the structures shown in FIG. 1B.
- the first and second transmission filter units Tx1 and Tx2 may have a structure in which a plurality of resonant stages are sequentially connected.
- the switching unit 20 in the structure to extinguish or maintain the resonant function of the corresponding resonant end according to the external control signal to the third resonant end of the second transmission filter (Tx2). can be configured. With this arrangement, it is possible to set only the first transmission filter unit Tx1 to be operated by the switching operation of the switching unit 20, or to enable both the first and second transmission filter units Tx1 and Tx2 to be operated. Done.
- each of the input lines i1 and i2 coupled to the first resonant stage (resonant element of the resonant stage) of each of the first and second transmit filter units Tx1 and Tx2 at one entry / exit port P1 is connected.
- the lengths of the input lines i1 and i2 are precisely designed in consideration of the wavelength of the corresponding filtering frequency.
- Patent Publication No. 10-2008-0114104 discloses a structure in which an input port P1 is connected to one common resonant end which is commonly used with the first resonant ends of two filter units.
- the structure shown in FIG. 2B is a structure in which the first and second filter units F1 and F2 are combined in a duplexer type.
- a signal input to the first port P1 may be formed of a first and second filters. After each of the second filter units F1 and F2 is distributed, the signal passing through the first filter unit F1 is output to the second port P2, and the signal passing through the second filter unit F2 is transferred to the third port P3. Will be printed).
- the switching unit 20 in a structure that extinguish or maintain the resonance function of the resonator stage. Can be configured.
- the structure shown in FIG. 2A may correspond similarly to the overall filter structure shown in FIG. 1B.
- the switching unit 20 may be configured at the second resonant end of the second transmission filter unit Tx2.
- FIG. 3 is a circuit diagram of a radio frequency filter according to a first embodiment of the present invention
- FIG. 4 is a waveform diagram of filtering characteristics in an exemplary operation of FIG. 3, and a waveform when the switching operation of the switching unit 20 is in an off state
- 5 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 3, and illustrates waveforms when the switching operation of the switching unit 20 is on.
- the circuit of the radio frequency filter illustrated in FIG. 3 may be, for example, a circuit corresponding to the structure of the duplexer type illustrated in FIG. 2B, but is different from the structure illustrated in FIG. 2B.
- the structure in which the switching unit 20 is formed in the first resonator stage is illustrated.
- each of the first filter unit F1 and the second filter unit F2 may be represented by a circuit in which a plurality of LC resonant stages (for example, six) are sequentially connected. Coupling between is represented by L.
- the first LC resonant stage has a structure that can be connected to the ground terminal through the switching unit 20.
- the center frequency of the pass band of the first filter unit F1 may be designed to be about 810-820 MHz, and the center frequency of the pass band of the second filter unit F2 may be designed to be about 780-790 MHz.
- FIG. 4 when the switching unit 20 is in an off state, it can be seen that the first filter unit F1 and the second filter unit F2 operate normally.
- FIG. 5 when the switching unit 20 is in the on state, the second filter unit F2 does not operate but only the first filter unit F1 operates. However, in this case, it can be seen that the filtering characteristic is rather good.
- FIG. 6 is a circuit diagram of a radio frequency filter according to a second embodiment of the present invention
- FIG. 7 is a waveform diagram of filtering characteristics in the example operation of FIG. 6, and is a waveform when the switching operation of the switching unit 20 is on.
- the circuit of the radio frequency filter illustrated in FIG. 6 is the same as the circuit illustrated in FIG. 3, but unlike the embodiment of FIG. 3, the switching unit 20 is provided in the second resonant stage. The structure that is formed is shown. In this case, it can be seen that the filtering characteristics are relatively good.
- FIG. 8 is a circuit diagram of a radio frequency filter according to a third embodiment of the present invention
- FIG. 9 is a waveform diagram of filtering characteristics in an exemplary operation of FIG. 8, which is a waveform when the switching operation of the switching unit 20 is on.
- the circuit of the radio frequency filter shown in FIG. 8 is the same as the circuit shown in FIGS. 3 and 6, but unlike the embodiments of FIGS. 3 and 6, switching to a third resonant stage
- the structure in which the part 20 is formed is shown.
- the filtering characteristic shows a very good characteristic similarly to the case where only the first filter portion F1 is provided, not the structure actually combined with the second filter portion F2.
- FIG. 10 is a circuit diagram of a radio frequency filter according to a fourth embodiment of the present invention
- FIG. 11 is a waveform diagram of filtering characteristics in an exemplary operation of FIG. 10, and is a waveform when the switching operation of the switching unit 20 is in an off state
- 12 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 10, and illustrates waveforms when the switching operation of the switching unit 20 is on.
- the circuit of the radio frequency filter illustrated in FIG. 10 may be, for example, a circuit corresponding to the structure of the combiner type illustrated in FIG. 2A, but is illustrated in FIG. 2A. Unlike the structure, a structure in which the switching unit 20 is formed in the first resonator stage is illustrated.
- each of the first transmission filter unit Tx1 and the second transmission filter unit Tx2 may be represented by a circuit in which a plurality of LC resonant stages (for example, six) are sequentially connected.
- the first LC resonator stage has a structure that can be connected to the ground terminal through the switching unit 20.
- the center frequency of the pass band of the first transmission filter unit Tx1 may be designed as about 780-790 MHz, and the center frequency of the pass band of the second transmission filter unit Tx2 may be designed as about 810-820 MHz. have.
- FIG. 11 when the switching unit 20 is in an off state, it can be seen that the first transmission filter unit Tx1 and the second transmission filter unit Tx2 operate normally.
- FIG. 12 when the switching unit 20 is in an on state, the second transmission filter unit Tx2 does not operate but only the first transmission filter unit Tx1 operates. However, in this case, it can be seen that the filtering characteristic is rather good.
- FIG. 13 is a circuit diagram of a radio frequency filter according to a fifth embodiment of the present invention.
- FIG. 14 is a waveform diagram of filtering characteristics in the example operation of FIG. 13, and is a waveform when the switching operation of the switching unit 20 is on.
- the circuit of the radio frequency filter illustrated in FIG. 13 is the same as the circuit illustrated in FIG. 11, but unlike the embodiment of FIG. 11, the switching unit 20 is provided in the second resonant stage. The structure that is formed is shown. In this case, it can be seen that the filtering characteristic is somewhat better than the embodiment of FIG.
- FIG. 15 is a circuit diagram of a radio frequency filter according to a sixth embodiment of the present invention.
- FIG. 16 is a waveform diagram of filtering characteristics in the example operation of FIG. 15, and is a waveform when the switching operation of the switching unit 20 is on. Indicates. 15 and 16, the circuit of the radio frequency filter illustrated in FIG. 15 is mostly the same as the circuit illustrated in FIGS. 10 and 13, except that the switching unit 20 is formed in the third resonant stage. It is becoming. In this case, it can be seen that the filtering characteristic is the best.
- FIG. 17 is a circuit diagram of an experimentally implemented radio frequency filter for comparison with the present invention and embodiments
- FIG. 18 is a waveform diagram of filtering characteristics in an exemplary operation of FIG. 17, wherein the switching operation of the switching unit 30 is turned on.
- 19 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 17, and illustrates a waveform when the switching operation of the switching unit 30 is in an off state.
- the circuit of the radio frequency filter illustrated in FIG. 10 may be, for example, a circuit corresponding to the structure of the combiner type illustrated in FIG. 2A, but is illustrated in FIG. 2A.
- the switching unit 30 for connecting or blocking the path to the signal path provided to the first transmission filter unit (Tx1) side is configured.
- the switching unit 30 may have a switch structure of a general solenoid driving method.
- FIG. 20 is a circuit diagram of a radio frequency filter according to a seventh embodiment of the present invention
- FIG. 21 is a waveform diagram of filtering characteristics in the example operation of FIG. 20, and is a waveform when the switching operation of the switching unit 20 is in an off state
- 22 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 20, and illustrates waveforms when the switching operation of the switching unit 20 is in an on state.
- the circuit of the radio frequency filter shown in FIG. 20 may correspond, for example, similarly to the structure shown in FIG. 2B, and the actual circuit of the radio frequency filter 10 shown in FIG. 1B. It may be a circuit that may be configured at implementation.
- FIG. 21 is a waveform diagram of filtering characteristics in the example operation of FIG. 20, and is a waveform when the switching operation of the switching unit 20 is in an off state
- 22 is a waveform diagram illustrating filtering characteristics in another exemplary operation of FIG. 20, and illustrates waveforms when the switching operation of the switching unit 20 is
- the center frequency of the pass band of the second transmission filter unit Tx2 may be designed to be about 770-785 MHz.
- FIG. 23 is a first exemplary structural diagram of a switching terminal that may be applied to a switching unit of embodiments of the present invention.
- FIG. 23 (a) shows a case in which the switching terminal 22 is in an on state
- FIG. 23 (b). Indicates a case where the switching terminal 22 is in an off state.
- FIG. 24 is a first exemplary structural diagram of a driver 24 and an associated filter main part for driving the switching terminal 22 of FIG. 23, showing the state in which the switching terminal 22 is installed on the cover 104 of the radio frequency filter. It is becoming.
- 24A illustrates a case where the switching terminal 22 is in an on state
- FIG. 24B illustrates a case where the switching terminal 22 is in an off state.
- the switching unit according to the exemplary embodiment of the present invention is designed to be movable to draw into and out of the filter, and is electrically connected to the resonance element 106 when drawn into the filter.
- a switching terminal 22 having a switching pin 202 connecting the resonant element 106 to a ground terminal; And a driver 24 for moving the switching pin 202 by an external control signal.
- the switching terminal 22 also includes a spring (elastic material) 204 which provides a restoring force for restoring the switching pin 202 to an initial position;
- a case 206 may be further provided to surround and support the switching pin 202 and the spring 204.
- the case 206 may be provided through a through hole and a screw coupling structure provided in place of the cover 104 of the filter. In a coupled manner, the switching terminal 22 can be installed.
- the driver 24 has a main configuration of a motor that generates a driving force by an external control signal, and includes a pressing mechanism 242 that is driven by a driving force of the motor to move the switching pin 202 in a pressing manner.
- the pressing mechanism 242 may rotate in an upward and downward direction from the top of the switching pin 202 when the motor is driven to have a structure of pressing the protruding upper end of the switching pin 202. have.
- FIG. 24 illustrates an internal structure of one resonator stage of the radio frequency filter, wherein the radio frequency filter implements at least one or more internal spaces, ie, cavities, through the housing 102, and the resonant elements 106 in each cavity. And a housing 10 sealed with the cover 104.
- the cover 104 may be provided with the spring terminal 22 and the driver 24.
- the resonating element 106 may be composed of, for example, a metallic resonating element 106 in the form of a metal rod.
- the switching pin 20 of the switching terminal 22 is made of a metal material, and thus, a filter.
- the resonating element 106 is directly connected to the upper end of the resonating element 106 when being inserted into the ground, thereby connecting the resonating element 106 to the ground terminal.
- FIG. 25 is a second exemplary structural diagram of a driver for driving the switching terminal of FIG. 23 and an associated filter main part, in which FIG. 25A illustrates a case where the switching terminal 22 is in an ON state, and FIG. Indicates a case where the switching terminal 22 is in an off state.
- the switching terminal 22 shown in FIG. 25 and its installation structure are the same as the structure shown in FIG. 24 above, but have some differences in the structure of the driver 26.
- the push mechanism 262 for moving the switching pin 202 in the form of pushing the switch pin 262 has an inclined surface which is in contact with the upper end of the switching pin 202, and the switching pin ( The upper side of the switching pin 202 is pushed while sliding linearly from the side to the side 202 side by the inclined surface.
- 26A and 26B are third exemplary plan and side structural views of a driver and associated filter main part for driving the switching terminal of FIG. 23, wherein FIGS. 26A and 26B show a switching terminal 22. 26A and 26B show the case where the switching terminal 22 is in the OFF state.
- the switching terminal 22 shown in FIG. 25 and the installation structure thereof are the same as the structure shown in FIG. 24 above, but have a slight difference in the structure of the driver 28.
- the pressing mechanism 282 for moving the switching pin 202 in the form of pushing the switch 28 has an inclined surface which is in contact with the upper end of the switching pin 202, and the switching pin ( The upper side of the switching pin 202 is slid by the inclined surface while rotating in an arc toward the side 202 may have a structure that is pressed.
- FIG. 27 is a second exemplary structural diagram of a main part of a switching terminal and an associated filter applicable to the switching part of the embodiments of the present invention, showing the configuration of the switching terminal when the resonant element 108 is DR.
- the switching pin 26 may be composed of a ferrite component.
- the switching pin 20 of the switching terminal 22 is positioned close to the upper end of the resonating element 108 at the time of entering into the filter and serves to eliminate the resonant function.
- FIG. 27 a structure in which the switching pin 26 is introduced into the filter through the through hole of the tuning screw 17 configured in the hollow form is illustrated as an example.
- Korean Patent Laid-Open Publication No. 10-2009-0053581 name: “tuning method of the dielectric resonance filter” filed by the present applicant , Publication date: May 12, 2009, inventor: Park Nam-shin, Lee Don-yong).
- the structure of the driver (not shown) for moving the switching pin 26 composed of such a ferrite component into the cavity may be configured similarly to the structure of the driver disclosed in FIGS. 24 to 26B.
- the switching unit according to the features of the present invention is applied to the second transmission filter unit (Tx2) side
- the second reception filter unit Rx2 has been described as an example in which a switching unit is not configured.
- the second reception filter is necessarily the second reception filter. This is because it is not necessary to interrupt the operation of the negative Rx2.
- the switching unit may also be configured to be applied to the second reception filter unit Rx2.
- the present invention is preferably applied to a radio frequency filter having a cavity structure, but in addition to the present invention, for a filter having a circuit structure in which a plurality of resonant stages are sequentially connected, a specific resonant stage is connected to a ground end. All can be applied to have a structure.
- the switching unit is applied to only one resonant stage among the plurality of resonant stages constituting the specific filter unit, but in some cases, it may be implemented to be applied to two or more resonant stages, respectively.
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Claims (10)
- 무선 주파수 필터에 있어서,기본 주파수 대역인 제1주파수 대역의 신호를 필터링 하기 위한 제1 필터부와;상기 기본 주파수 대역과 더불어 추가되는 추가 주파수 대역인 제2주파수 대역의 신호를 필터링하기 위한 제2 필터부와;상기 제2 필터부를 구성하는 공진단(들) 중에서 적어도 하나의 공진단을 접지단과 연결 또는 차단하여 해당 공진단의 공진 기능을 소멸 또는 유지하는 구조를 가지는 스위칭부를 포함함을 특징으로 하는 무선 주파수 필터.
- 제1항에 있어서, 상기 제2필터부는 다수의 공진단이 다단으로 순차적으로 연결된 구조를 가지며,상기 스위칭부는 두번째 공진단 또는 세번째 공진단을 접지단과 연결하도록 구성됨을 특징으로 하는 무선 주파수 필터.
- 제1항에 있어서, 상기 제2 필터부는 캐비티 구조를 가지며;상기 스위칭부는,상기 캐비티 내부로 인입 및 캐비티 외부로 인출되도록 이동 가능하게 설계되며, 캐비티 내부로 인입시 공진 소자와 전기적으로 연결되어 상기 공진 소자를 접지단과 연결하는 스위칭 핀을 구비하는 스위칭 단자와;외부 제어신호에 의해 상기 스위칭 핀을 이동시키는 구동기를 포함함을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서, 상기 공진 소자는 금속 봉 형태의 공진 소자이며;상기 스위칭 핀은 금속 재질로 구성되며, 상기 캐비티 내부로 인입시 상기 공진 소자의 상단과 직접 접촉하여 상기 공진 소자를 접지단과 연결하는 구조를 가짐을 특징으로 하는 무선 주파수 필터.
- 제4항에 있어서, 상기 스위칭 단자는,상기 스위칭 핀을 초기 위치로 복원시키기 위한 복원력을 제공하는 탄성체와;상기 스위칭 핀 및 상기 탄성체를 전체적으로 감싸며 지지하는 케이스를 더 구비하며;상기 케이스가 상기 캐비티를 일부 형성하는 커버에 마련되는 관통홀에 결합되어 설치됨을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서, 상기 공진 소자는 유전체 공진 소자이며;상기 스위칭 핀은 페라이트 성분으로 구성되며, 상기 캐비티 내부로 인입시 상기 공진 소자의 상단과 근접하게 위치하여 공진 기능을 소멸시키도록 구성됨을 특징으로 하는 무선 주파수 필터.
- 제3항 내지 제6항 중 어느 한 항에 있어서, 상기 구동기는 외부 제어 신호에 의해 구동력을 발생하는 모터를 주요 구성으로 가지며, 상기 모터의 구동력에 의해 구동되어 상기 스위칭 핀을 누르는 형태로 이동시키는 누름 기구물을 포함함을 특징으로 하는 무선 주파수 필터.
- 제7항에 있어서, 상기 누름 기구물은 상기 모터 구동시에 상기 스프링 핀의 상부에서 상하 방향으로 호를 그리며 회전 이동하여, 상기 스프링 핀의 돌출된 상단을 누르는 구조를 가짐을 특징으로 하는 무선 주파수 필터.
- 제7항에 있어서, 상기 누름 기구물은 상기 스프링 핀의 상단과 맞닿는 경사면을 구비하며, 상기 모터 구동시에 상기 스프링 핀측으로 측면에서 직선 이동하며 상기 경사면에 의해 스프링 핀의 상단이 미끄러지면서 눌려지게 되는 구조를 가짐을 특징으로 하는 무선 주파수 필터.
- 제7항에 있어서, 상기 누름 기구물은 상기 스프링 핀의 상단과 맞닿는 경사면을 구비하며, 상기 모터 구동시에 상기 스프링 핀측으로 측면에서 호를 그리며 회전 이동하며 상기 경사면에 의해 상기 스프링 핀의 상단이 미끄러지면서 눌려지게 되는 구조를 가짐을 특징으로 하는 무선 주파수 필터.
Priority Applications (4)
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CN201480010477.6A CN105027437A (zh) | 2013-03-08 | 2014-03-07 | 射频滤波器 |
JP2015561275A JP2016515336A (ja) | 2013-03-08 | 2014-03-07 | 無線周波数フィルタ |
EP14759440.2A EP2966776A1 (en) | 2013-03-08 | 2014-03-07 | Radio frequency filter |
US14/847,629 US20150380793A1 (en) | 2013-03-08 | 2015-09-08 | Radio frequency filter |
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KR1020130025092A KR20140110546A (ko) | 2013-03-08 | 2013-03-08 | 무선 주파수 필터 |
KR10-2013-0025092 | 2013-03-08 |
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US14/847,629 Continuation US20150380793A1 (en) | 2013-03-08 | 2015-09-08 | Radio frequency filter |
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WO2014137194A1 true WO2014137194A1 (ko) | 2014-09-12 |
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PCT/KR2014/001909 WO2014137194A1 (ko) | 2013-03-08 | 2014-03-07 | 무선 주파수 필터 |
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US (1) | US20150380793A1 (ko) |
EP (1) | EP2966776A1 (ko) |
JP (1) | JP2016515336A (ko) |
KR (1) | KR20140110546A (ko) |
CN (1) | CN105027437A (ko) |
WO (1) | WO2014137194A1 (ko) |
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KR101685111B1 (ko) * | 2014-10-16 | 2016-12-12 | 주식회사 에이스테크놀로지 | 자동 튜닝이 가능한 rf 캐비티 장치 |
US9899716B1 (en) * | 2015-03-01 | 2018-02-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Waveguide E-plane filter |
CN107359389B (zh) * | 2016-05-10 | 2020-01-10 | 南京威翔科技有限公司 | 一种三工器 |
JP6652671B1 (ja) * | 2019-03-14 | 2020-02-26 | 株式会社フジクラ | スイッチ装置 |
WO2022225294A1 (ko) * | 2021-04-19 | 2022-10-27 | 주식회사 케이엠더블유 | 스위칭 가능한 필터 |
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- 2013-03-08 KR KR1020130025092A patent/KR20140110546A/ko not_active Application Discontinuation
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- 2014-03-07 CN CN201480010477.6A patent/CN105027437A/zh active Pending
- 2014-03-07 JP JP2015561275A patent/JP2016515336A/ja not_active Withdrawn
- 2014-03-07 WO PCT/KR2014/001909 patent/WO2014137194A1/ko active Application Filing
- 2014-03-07 EP EP14759440.2A patent/EP2966776A1/en not_active Withdrawn
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2015
- 2015-09-08 US US14/847,629 patent/US20150380793A1/en not_active Abandoned
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KR20020010396A (ko) * | 2000-07-29 | 2002-02-04 | 김덕용 | 알에프 스위치 |
KR20040100084A (ko) | 2003-05-21 | 2004-12-02 | 주식회사 케이엠더블유 | 무선 주파수 필터 |
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Also Published As
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JP2016515336A (ja) | 2016-05-26 |
US20150380793A1 (en) | 2015-12-31 |
CN105027437A (zh) | 2015-11-04 |
KR20140110546A (ko) | 2014-09-17 |
EP2966776A1 (en) | 2016-01-13 |
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