CN2664294Y - A radio-frequency device having multiple-unit duplexer - Google Patents
A radio-frequency device having multiple-unit duplexer Download PDFInfo
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- CN2664294Y CN2664294Y CN 200320117927 CN200320117927U CN2664294Y CN 2664294 Y CN2664294 Y CN 2664294Y CN 200320117927 CN200320117927 CN 200320117927 CN 200320117927 U CN200320117927 U CN 200320117927U CN 2664294 Y CN2664294 Y CN 2664294Y
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Abstract
A radio-frequency device having multiple-unit duplexer comprises at least two independent cavity duplexers, wherein, each cavity duplexer comprises a transmission channel filter, a receiving channel filter, a low-pass filtering module and a set of radio-frequency interfaces, wherein, the plural cavity duplexers are arranged inside one multilayer casing and have adjacent units sharing one isolation plate. The structural design makes cavity duplexer possess compact structure to reduce volume of whole device; moreover, the utility model possesses outstanding performance identical to that of independent duplexer of same size with the cavity such as small insertion loss, strong capability of out-of-band rejection and selectivity etc., thereby overcoming the contradiction that cavity duplexer can not possesses small volume and high performance at the same time.
Description
Technical field
The present invention relates to a kind of radio-frequency unit, relate in particular to and a kind ofly combine the radio-frequency unit that is applicable to communication system base station by a plurality of independently duplexers.
Background technology
Modern society, along with the development of mobile communications industry, mobile phone and personal digital assistant device have obtained application more and more widely, and develop to the direction of miniaturization and high electrical property.At present, the radio frequency that communication system adopted has covered very wide frequency band, and for example, frequency band commonly used has 800MHz to 1GHz, and 1.5GHz is to 2GHz.Especially recent, along with further developing of mobile communications industry, terminal has had very high function, can realize the combination between figure pattern, combination as a kind of time division multiple access (TDMA) pattern and a kind of code division multiple access (CDMA) pattern, correspondingly, produced the combination between the frequency band, such as the combination of 800MHz frequency band and 1.9GHz frequency band.
For satisfying the needs of mobile communication terminal development, radio-frequency (RF) component such as the filter in the mobile communication base station, duplexer are used also more and more widely.Wherein, duplexer has just satisfied the needs of mobile communication equipment duplex system, and so-called duplex system is that either party can transmit also can receiving communication signal, uses different operating frequencies respectively but transmit and receive signal.So, separate by receiving, and keep certain frequency interval each other, so disturb between having reduced frequently greatly with emission signal frequency.This duplexer operation principle structure chart of the prior art as shown in Figure 1, band pass filter and a low pass filter of comprising the band pass filter of a transmission channel, a receive path, this low pass filter plays the effect of filtering high frequency clutter, makes the band outside inhibitory of whole duplexer can be better.Wherein, emission filter and receiving filter the most basic the most direct application are to suppress the unwanted signal frequency, and make the signal frequency that needs be able to smooth transmission, and the effect of duplexer is exactly to avoid directly each passage being come superposition with simple transmission line junction, thereby avoids because reflection and leakage cause very big energy loss.Simultaneously, be high-performance and the little requirement of volume of satisfying duplexer, the general employing of prior art has the resonant cavity that carries, its Q value (quality factor of resonant cavity of carrying are arranged, quality factor) than the resonant cavity height of no-load, and the height of Q value is directly proportional with the performance of duplexer in cavity body filter, be that high more its performance of Q value is good more, but the Q value often is directly proportional with the size of cavity, therefore, high-performance and small size are conflicting often in cavity body filter, and the problem of most critical is exactly how to handle the contradiction of performance and volume well in the duplexer design of being made up of filter.Particularly in communication base station, tend to exist the situation of using a plurality of duplexers, because the space, base station is limited, just restricted to the space that duplexer occupied, when using a plurality of duplexer, small size, high performance contradiction are more outstanding, how to solve this contradiction is also paid close attention to by more people.
For solving the bulky defective of duplexer, the U.S. the 3rd, 380, in No. 823 patents, a kind of acoustic surface wave duplexer with two duplexers is disclosed, with two independently Duplexer Unit make up by a container with sandwich construction, thereby dwindled the shared volume of each Duplexer Unit, but because this duplexer is made up of Surface Acoustic Wave Filter, and Surface Acoustic Wave Filter is compared with cavity body filter, has the big shortcoming of the loss of insertion, duplexer after the combination has still that to insert loss bigger, and the outer inhibition degree of band is little, the shortcoming of poor selectivity, can't replace of the application of cavity duplexer, particularly can't substitute the application of cavity duplexer on the mobile communication base station in corresponding field.
In sum, duplexer device of the prior art can't be realized smaller volume and preferable performance simultaneously, does not overcome the contradiction between volume and the performance, and the combination between the duplexer still can not be successfully applied to the cavity duplexer in the prior art.
Summary of the invention
Technical problem to be solved by this invention is: overcome the duplexer that exists in the prior art and can not realize the little and high performance defective of volume simultaneously, a kind of volume is less to provide, compact conformation, insertion loss are little, the band radio-frequency unit with a plurality of Duplexer Unit that outer inhibition ability is strong, selectivity is strong.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of radio-frequency unit with multiple unit duplexer, comprise at least two individual cavity duplexers, each cavity duplexer all comprises a transmission channel filter, a receive path filter, one group of radio frequency interface that is connected with the outside, described a plurality of cavity duplexer places in the same multilayer shell, shared division board between the adjacent cavity duplexer.
Described radio-frequency unit, wherein: described a plurality of duplexers are two, described housing is separated into two layers by base plate, any two path filter cavity hatch of described two cavity duplexers outwards are arranged on the both sides of described base plate abreast, and described division board comprises described base plate and inner walls plate.
Described radio-frequency unit, wherein: the transmission channel filter of described two cavity duplexers is arranged on the same side of described base plate, and the receive path filter of described two cavity duplexers is arranged on the opposite side of described base plate.
Described radio-frequency unit, wherein: the transmission channel filter of a described cavity duplexer and receive path filter are arranged on the same side of described base plate, and the transmission channel filter of another cavity duplexer and receive path filter are arranged on the opposite side of described base plate.
Described radio-frequency unit, wherein: the transmission channel filter of a described cavity duplexer and the receive path filter of another cavity duplexer are arranged on described base plate the same side, and the receive path filter of a described cavity duplexer and the transmission channel filter of another cavity duplexer are arranged on the opposite side of described base plate.
Described radio-frequency unit, wherein: the panel of described radio-frequency unit is arranged on the housing side adjacent with each path filter of described each cavity duplexer, and described all radio frequency interfaces all are arranged on the described panel.
Described radio-frequency unit, wherein: the antennal interface in the described radio frequency interface is arranged on the position near described housing base plate.
Described radio-frequency unit, wherein: described each cavity duplexer also comprises: a low-pass filtering module, the parallel connected end of one end of described low-pass filtering module and described transmission channel filter and receive path filter is joined, the other end of described low-pass filtering module and described antennal interface join, and described low-pass filtering module adopts coaxial line filter.
Beneficial effect of the present invention is: because the present invention is arranged on described a plurality of individual cavity duplexers in the same multilayer shell, shared same wallboard of adjacent cavity duplexer or base plate, this method for designing makes cavity diplexer structure compactness, on volume, be far smaller than the volume of a plurality of separate double multiplexers, and on performance, have that the same insertion loss of the separate double multiplexer identical with cavity size is little, band outer inhibition ability is strong, selectivity is strong superior function, therefore, overcome the contradiction that cavity duplexer small size and high-performance can not be taken into account simultaneously; Moreover, because shared same wallboard of adjacent cavity duplexer or base plate, thereby saved the material of a wall and a base plate, reduced a lot of costs, make produce more convenient; All be arranged on the panel of radio-frequency unit owing to all radio frequency interfaces of duplexer again, not only made things convenient for this radio-frequency unit and other device to be used, thereby and, further guaranteed the premium properties of radio-frequency unit owing to there is not cable to connect the insertion loss of having avoided cable to bring.
Description of drawings
Fig. 1 is the schematic diagram of duplexer in the prior art.
Fig. 2 is the schematic diagram with radio-frequency unit of two independent Duplexer Unit of the present invention.
The structure cross-sectional view of the resonant cavity that Fig. 3 adopts for the radio-frequency unit with two independent Duplexer Unit of the present invention.
Fig. 4 is the three-dimensional structure diagram of the transmission channel of two Duplexer Unit in same housing.
Fig. 5 removes the vertical view of upper cover plate with latter two duplexer transmission channel for the radio-frequency unit with two independent Duplexer Unit of the present invention.
Fig. 6 is the three-dimensional structure diagram of the receive path of two Duplexer Unit in same housing.
Fig. 7 removes the vertical view of lower cover with latter two duplexer receive path for the radio-frequency unit with two independent Duplexer Unit of the present invention.
Fig. 8 is the transfer curve of transmission channel filter shown in Figure 4.
Fig. 9 removes the later forward direction transversal profile figure of panel for the radio-frequency unit with two independent Duplexer Unit of the present invention.
Embodiment
Below with reference to the accompanying drawings, be that example is described in further detail the present invention to have two cavity Duplexer Unit:
Fig. 1 has disclosed the basic principle of duplexer of the prior art, and promptly a duplexer often includes two band pass filters, can also comprise a low pass filter, forms duplexer by two band pass filter parallel connections are contacted with low pass filter again.
From principle of the invention figure shown in Figure 2 as seen, radio-frequency unit comprises two Duplexer Unit, each Duplexer Unit all comprises a transmission channel filter, a receive path filter, a low-pass filtering module, the antenna terminal group that connects exterior antenna, the reception terminal group that connects external circuit, the transmission terminal group that connects external circuit, the coupling terminal group that can also comprise a coupling module and connection external circuit, with Duplexer Unit A is example, after signal receives by antenna, the signal that receives enters Duplexer Unit by antenna port 1, pass through coupling module successively, low-pass filtering module and receive path filter are through receiving port 2 input base station systems; During the signal emission, the signal of launching through emission port 3 from base station system passes through transmission channel filter, low-pass filtering module, coupling module successively, and launches through antenna port 1.Wherein, transmission channel filter apparatus (comprising: transmission channel filter and receive path filter) includes resonant cavity, resonant rod, frequency adjustment screw rod and radio-frequency joint, each resonant cavity all has the resonance centre frequency of oneself, coupled to each other between the adjacent resonators, the whole filter device has the resonance passband of oneself.The existence of described low-pass filtering module makes this device have higher inhibition ability to the high-frequency harmonic signal, the effect of described coupling module is that the signal energy of the antenna opening mode by coupling is passed out a part, transmit to the standing wave warning circuit to coupling port 5 by forward direction coupling port 4 and back, by the standing wave warning circuit signal is detected, each duplexer also is furnished with calibrating terminal 6 in addition, is used in case of necessity signal being tested.Low-pass filtering module adopts the coaxial line filter mode to realize in the present invention.
Fig. 3 has shown the structure of one of them resonant cavity of transmission channel filter of the present invention.This resonant cavity adopts the mode of carrying, comprise cavity 23, resonant rod 21, frequency tuning screw rod 22, cover plate 24, wherein cavity 23 has the opening that can use cover plate 24 to cover, resonant rod 21 is fixed on the cavity 23, and frequency tuning screw rod 22 is positioned on the cover plate, and it is by changing screw rod changes cavity to the distance of bottom resonance frequency, the transmission channel filter is made up of a plurality of resonant cavitys, has window between chamber and the chamber energy is transmitted by being coupled.
By Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, the present invention is on structural design, and two cavity Duplexer Unit place in the housing 20 jointly, and housing 20 is separated into two layers by base plate 27.Any two path filters of two duplexers, its cavity 231,232 openings of transmission channel cavity body filter that for example Figure 4 shows that duplexer A and duplexer B outwards are arranged side by side the side at housing base plate 27, two cavity 231,232 shared wallboards 28, resonant rod 211,212 places respectively in the resonant cavity 231,232; The receive path cavity body filter of duplexer A and duplexer B, its cavity 233,234 openings outwards are arranged side by side the opposite side at housing base plate 27, the back side of duplexer A and the pairing transmission channel resonant cavity of duplexer B cavity 231,232 just, two cavity 233,234 shared wallboards 28, resonant rod 213,214 places respectively in the resonant cavity 233,234.This shows that two cavity duplexers place in the same housing, and shared same wallboard 28 and base plate 27, so compact conformation, on volume, be far smaller than the volume of the identical a plurality of separate double multiplexers of cavity size, reached the purpose that volume is little, performance is high; And saved the material of a wallboard and a base plate, and reduced a lot of costs, produce more convenient.
Fig. 8 is the transfer curve of Fig. 4, transmission channel filter shown in Figure 5.From curve as can be seen, this filter all has very strong inhibitory action to being lower than 1800M with the signal that is higher than 1900M, especially to the degree of decay of the signal that is higher than 1900M near 100db, thereby realized strong inhibitory action to the used 1900M signal of cdma system.
Be also shown in by Fig. 4, Fig. 5, Fig. 6, Fig. 7, the panel 29 of device of the present invention is positioned at a side of the housing 20 all adjacent with the receive path filter with the transmission channel filter of Duplexer Unit A and Duplexer Unit B, coupling module 15,16 is arranged between panel 29 and two duplexers, all radio frequency interfaces (terminal) 17 all design on same panel 29, and all radio frequency interfaces comprise emission port, receiving port, antenna port, coupling port and test port among duplexer A and the duplexer B.This design has not only made things convenient for this radio-frequency unit and other device to be used, thereby and owing to there is not cable to connect the insertion loss of having avoided cable to bring, further guaranteed the premium properties of radio-frequency unit.
Fig. 9 is that two duplexers of the present invention place a housing to remove the later cross-sectional view of panel together, and it is as follows to describe several execution modes in detail with this figure.Among the figure, the receive path filter 1 that is in 11 positions has constituted Duplexer Unit A with the transmission channel filter 1 that is in 12 positions, and the receive path filter 2 that is in 13 positions has constituted Duplexer Unit B with the transmission channel filter 2 that is in 14 positions.As seen from the figure, the transmission channel filter of two duplexers is arranged side by side the side (upside) at base plate 27, the receive path filter of two duplexers is arranged side by side the opposite side (downside) at base plate 27, and back-to-back setting between the transmission channel of each duplexer, separate by base plate 27, at this moment, shared division board is a wallboard 28 between two duplexer A and the B.Can also develop out another kind of version thus: when the transmission channel filter location of two duplexers constant, and the location swap of receive path filter 1 and receive path filter 2, be that receive path filter 1 is in 13 positions, receive path filter 2 is in 11 positions, the emission of two duplexers just, receive path filter are arranged in a crossed manner, at this moment, shared division board is wallboard 28 and base plate 27 between two duplexer A and the B.When if the combination of three or more cavity Duplexer Unit is arranged, can by said structure with its design in same housing, the 3rd duplexer C is the shared same wallboard of neighbour with duplexer A or duplexer B, the rest may be inferred.
In actual use, the side that its structural design also can be separately positioned on housing base plate 27 with receive path filter 1 and the transmission channel filter 1 of Duplexer Unit A, i.e. 12 and 14 position, and the back side of the respective channel filter that receive path filter 2 and the transmission channel filter 2 of Duplexer Unit B is arranged on duplexer A, i.e. 11 and 13 position, at this moment, the shared base plate 27 of Duplexer Unit A and Duplexer Unit B; Can also develop out another kind of version thus: the receive path filter 1 of Duplexer Unit A and transmission channel filter 1 invariant position, and duplexer B receive path filter 2 and transmission channel filter 2 transpositions, be duplexer B receive path filter 2 i.e. 13 the position, transmission channel filter 1 back side that is arranged on duplexer A, duplexer B transmission channel filter 2 i.e. 11 the position, receive path filter 1 back side that is arranged on duplexer A, at this moment, shared base plate 27 of Duplexer Unit A and Duplexer Unit B and wallboard 28 have realized that equally volume is little, the purpose that performance is high.
In actual use, its structural design can also be arranged side by side the transmission channel filter 2 of the receive path filter 1 of Duplexer Unit A and Duplexer Unit B the side at base plate 27, i.e. 12 and 14 position, the transmission channel filter 1 of Duplexer Unit A and the receive path filter 2 of Duplexer Unit B are arranged on the opposite side of base plate 27, i.e. 11 and 13 position, at this moment, the transmission channel filter of each duplexer and the back-to-back setting of receive path filter, the shared division board of Duplexer Unit A and Duplexer Unit B is a wallboard 28.Can also develop out another kind of version thus: transmission channel filter 2 invariant positions of the receive path filter 1 of Duplexer Unit A and Duplexer Unit B, and receive path filter 2 location swaps of the transmission channel filter 1 of Duplexer Unit A and Duplexer Unit B, be i.e. 13 positions, the back side of the transmission channel filter 1 of the Duplexer Unit A transmission channel filter 2 that is arranged on Duplexer Unit B, the back side that the receive path filter 2 of Duplexer Unit B is arranged on the receive path filter 1 of Duplexer Unit A is 11 positions, at this moment, the shared division board of Duplexer Unit A and Duplexer Unit B is wallboard 28 and base plate 27.This class formation has been realized the purpose that volume is little, performance is high equally.
In said structure, can 7 designs of the antennal interface 1 of this device and antennal interface with the panel of these device case base plate 27 intersection location on, make the nearest of antennal interface and passage, help the performance that further reduces to insert loss, improves radio-frequency unit.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, deduce other combining structure, and all these changes or replacement all should be belonged to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of radio-frequency unit with multiple unit duplexer, comprise at least two individual cavity duplexers, each cavity duplexer all comprises a transmission channel filter, a receive path filter, one group of radio frequency interface that is connected with the outside, it is characterized in that: described a plurality of cavity duplexers place in the same multilayer shell, shared division board between the adjacent cavity duplexer.
2, radio-frequency unit according to claim 1, it is characterized in that: described a plurality of duplexers are two, described housing is separated into two layers by base plate, any two path filter cavity hatch of described two cavity duplexers outwards are arranged on the both sides of described base plate abreast, and described division board comprises described base plate and inner walls plate.
3, radio-frequency unit according to claim 2 is characterized in that: the transmission channel filter of described two cavity duplexers is arranged on the same side of described base plate, and the receive path filter of described two cavity duplexers is arranged on the opposite side of described base plate.
4, radio-frequency unit according to claim 2, it is characterized in that: the transmission channel filter of a described cavity duplexer and receive path filter are arranged on the same side of described base plate, and the transmission channel filter of another cavity duplexer and receive path filter are arranged on the opposite side of described base plate.
5, radio-frequency unit according to claim 2, it is characterized in that: the transmission channel filter of a described cavity duplexer and the receive path filter of another cavity duplexer are arranged on the same side of described base plate, and the receive path filter of a described cavity duplexer and the transmission channel filter of another cavity duplexer are arranged on the opposite side of described base plate.
6, radio-frequency unit according to claim 2 is characterized in that: the panel of described radio-frequency unit is arranged on the housing side adjacent with each path filter of described each cavity duplexer, and described all radio frequency interfaces all are arranged on the described panel.
7, radio-frequency unit according to claim 6 is characterized in that: the antennal interface in the described radio frequency interface is arranged on the position near described housing base plate.
8, according to any described radio-frequency unit in the claim 1 to 7, it is characterized in that: described each cavity duplexer also comprises: a low-pass filtering module, the parallel connected end of one end of described low-pass filtering module and described transmission channel filter and receive path filter is joined, the other end of described low-pass filtering module and described antennal interface join, and described low-pass filtering module adopts coaxial line filter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320117927 CN2664294Y (en) | 2003-11-08 | 2003-11-08 | A radio-frequency device having multiple-unit duplexer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200320117927 CN2664294Y (en) | 2003-11-08 | 2003-11-08 | A radio-frequency device having multiple-unit duplexer |
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| CN2664294Y true CN2664294Y (en) | 2004-12-15 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008052449A1 (en) * | 2006-11-03 | 2008-05-08 | Huawei Technologies Co., Ltd. | Method and apparatus for simplifying the rf front end |
| CN101859921A (en) * | 2010-01-07 | 2010-10-13 | 东莞市苏普尔电子科技有限公司 | Microstrip broadband dual-frequency combining method and combiner |
| WO2010124594A1 (en) * | 2009-04-29 | 2010-11-04 | 华为技术有限公司 | Die-casting duplexer and die-casting method |
| WO2012097674A1 (en) * | 2011-01-21 | 2012-07-26 | 华为技术有限公司 | Radio frequency module |
| CN102664598A (en) * | 2012-05-17 | 2012-09-12 | 三维通信股份有限公司 | Hot backup system of radio frequency power amplifiers and realization method |
| CN109066026A (en) * | 2018-07-05 | 2018-12-21 | 南京信息工程大学 | A kind of Ka band dual channel duplexer suitable for multi-antenna array |
| CN110011013A (en) * | 2012-03-21 | 2019-07-12 | 英特尔公司 | The subsystem structure of light weight cavity filter and radio |
| CN112909463A (en) * | 2021-01-18 | 2021-06-04 | 南京锦锋通讯科技有限公司 | Low-loss high-selectivity clutter suppression type base station duplexer |
| TWI849637B (en) * | 2021-12-23 | 2024-07-21 | 大陸商蘇州立訊技術有限公司 | A resonator filter |
-
2003
- 2003-11-08 CN CN 200320117927 patent/CN2664294Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008052449A1 (en) * | 2006-11-03 | 2008-05-08 | Huawei Technologies Co., Ltd. | Method and apparatus for simplifying the rf front end |
| WO2010124594A1 (en) * | 2009-04-29 | 2010-11-04 | 华为技术有限公司 | Die-casting duplexer and die-casting method |
| CN101859921A (en) * | 2010-01-07 | 2010-10-13 | 东莞市苏普尔电子科技有限公司 | Microstrip broadband dual-frequency combining method and combiner |
| CN101859921B (en) * | 2010-01-07 | 2013-10-09 | 东莞市苏普尔电子科技有限公司 | Microstrip broadband dual-frequency combining method and combiner |
| WO2012097674A1 (en) * | 2011-01-21 | 2012-07-26 | 华为技术有限公司 | Radio frequency module |
| CN110011013A (en) * | 2012-03-21 | 2019-07-12 | 英特尔公司 | The subsystem structure of light weight cavity filter and radio |
| CN102664598A (en) * | 2012-05-17 | 2012-09-12 | 三维通信股份有限公司 | Hot backup system of radio frequency power amplifiers and realization method |
| CN109066026A (en) * | 2018-07-05 | 2018-12-21 | 南京信息工程大学 | A kind of Ka band dual channel duplexer suitable for multi-antenna array |
| CN109066026B (en) * | 2018-07-05 | 2023-08-15 | 南京信息工程大学 | Ka-band double-channel duplexer applicable to multi-antenna array |
| CN112909463A (en) * | 2021-01-18 | 2021-06-04 | 南京锦锋通讯科技有限公司 | Low-loss high-selectivity clutter suppression type base station duplexer |
| TWI849637B (en) * | 2021-12-23 | 2024-07-21 | 大陸商蘇州立訊技術有限公司 | A resonator filter |
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