CN201044257Y - DCS/WCDMA double-frequency combiner and general double-frequency combiner - Google Patents
DCS/WCDMA double-frequency combiner and general double-frequency combiner Download PDFInfo
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- CN201044257Y CN201044257Y CNU2007200517738U CN200720051773U CN201044257Y CN 201044257 Y CN201044257 Y CN 201044257Y CN U2007200517738 U CNU2007200517738 U CN U2007200517738U CN 200720051773 U CN200720051773 U CN 200720051773U CN 201044257 Y CN201044257 Y CN 201044257Y
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Abstract
The utility model discloses a DCS/WCDMA double frequency mixer, wherein, the mixer adopts a distributed parameter type capacitance to replace the prior capacitance and also physically separates the direct current channel and the radio frequency channel which are arranged inside the mixer; moreover, the mixer smartly contains each part including the capacitance. Therefore, according to the same principle, the utility model discloses a double frequency mixer with wider application range and continues to adopt the distributed parameter type capacitance which is adopted by the DCS/WCDMA double frequency mixer. With relocation of the overall structure of the mixer, the utility model has the advantages of small volume, less insertion loss, big power capacity and high isolation between channels, etc.
Description
Technical field
The utility model relates to the treatment facility that closes the road between a kind of DCS of being used for and the WCDMA system, relates in particular to the DCS/WCDMA dual-frequency channel merger.
Background technology
Along with developing rapidly of mobile communication, the application mode of multisystem colocation site, common antenna feeder resource obtains the favor of increasing operator.Can reach by these modes and to cause shared resource, reduce the effect of system equipment cost.In the DCS/WCDMA co-space feedback system, the dual-frequency channel merger microwave device that is absolutely necessary, it mainly acts on is that signal to different system carries out a deciliter road, to reach the saving feeder cable, simplified system and the purpose that reduces cost.In addition, the power supply of equipment realizes by radio frequency cable on the base station towers, so the mixer that is connected in series with feeder cable also will have logical galvanic function.
With reference to schematic diagram shown in Figure 1, mixer is three port microwave devices, comprise two DC feedback paths and two radiofrequency signal paths, wherein: the DC feedback path is made up of lightning protection components such as lumped parameter low pass filter, switch and discharge tubes, low pass filter is used to suppress the high-frequency radio frequency signal, to allow the control signal of certain frequency (as 3MHz) pass through smoothly, whether switch is used for selecting to need direct current to pass through; The radiofrequency signal path is made up of electric capacity and band pass filter, and the free transmission range of the band pass filter in two radiofrequency signal paths adapts to the frequency range setting of the two paths of signals on the road of closing.During work, the signal of importing from public port Port1 shunts to port Port2 or port Port3 according to frequency range, on the contrary, also the signal from port Port2 and Port3 input can be closed road output through port Port1.
The radio frequency signal frequency scope of DCS/WCDMA co-space feedback system is 1710MHz-1880MHz and 1920MHz-2170MHz, realize the working band of so super width, and have perfectly straight stream electric work energy, present most of mixer product adopts the form realization of dielectric substrate with microstrip circuit.The shortcoming of the product of this version is that volume is big, and power capacity is little.And the passive intermodulation index depends on the characteristic of dielectric substrate material greatly, is difficult to control in batch process.
The utility model content
First purpose of the present utility model is to provide a kind of DCS/WCDMA dual-frequency channel merger, makes its miniaturization, and reach that Insertion Loss is little, power capacity is big and DC feedback path and radiofrequency signal path between effect such as isolation height.
Second purpose of the present utility model is to provide a kind of more general dual-frequency channel merger, to expand applicable situation of the present utility model, is applied to as among the 2G/3G co-space feedback system.
For solving technical problem of the present utility model, the utility model first purpose adopts following technical scheme to realize:
DCS/WCDMA dual-frequency channel merger of the present utility model, handle on the road of closing that is used to finish different frequency band signals, comprise and close road port, first port and second port, the first/the second port inserts jointly after radio frequency path and DC channel respectively and closes road port, described each radio frequency path comprises band pass filter and is connected on the electric capacity of band pass filter both sides that wherein two shared same being capacitively coupled to of band pass filter are closed road port; Described each DC channel comprises the low pass filter and the discharge tube of electric connection, and, two shared low pass filters of DC channel with close road port and electrically connect;
This mixer also comprises casing, and casing comprises body, circuit board and lid, and two band pass filters are arranged in the body and by metallic plate and separate mutually, and the body outside sets firmly described each port, and each electric capacity places in two band pass filters; Bodies top also is provided with some strutting pieces, the described low pass filter of installing on the strutting piece, and described discharge tube and switch then are fixed on this circuit board; Described lid and body locking.
Described each electric capacity is distributed constant formula electric capacity.
Described each electric capacity includes inner wire, insulator and sleeve, and insulator is set in the inner wire periphery, and sleeve then is set in the insulator periphery, and described sleeve is used for electrically connecting with the band pass filter of adjacency; Described inner wire is used for electrically connecting with the DC channel of adjacency, and and then is connected to each port of its adjacency.
Described insulator is a polytetrafluoroethylene film.
Described band pass filter includes some resonance posts, is provided with the backbone that is used to strengthen coupling effect between adjacent two resonance posts.
Corresponding two band pass filters of described circuit board are provided with and pass through the some tuning screw rod that circuit board gos deep into band pass filter, are used to regulate resonance frequency and coupling amount.
In described two band pass filters, first band pass filter adopts the mode of windowing to realize inductive coupled; The employing of second band pass filter flies the bar mode and realizes the capacitive coupling.
Described first and second band pass filters are near closing the shared resonance post in road port place.
First port and the resonance post number of closing the band pass filter between the road port are 7; Second port and the resonance post number of closing the band pass filter between the road port are 8.
Described DC channel also comprises switch, and the printed wire in the DC channel is provided with some places to be interrupted, and discontinuities is provided with groove, and groove is provided with the metal magnetic bead alternatively to realize on-off action.
Leave between described strutting piece upper surface and the circuit board bottom surface and be not less than 0.2 mm clearance.
Described lid offers through hole, and this through hole is coated with the Ge Er ventilated membrane.
The through hole of described lid is provided with protective plate.
Second purpose of the present utility model is achieved through the following technical solutions:
Dual-frequency channel merger described in the utility model, handle on the road of closing that is used to finish DCS and WCDMA signal, and comprise and close road port, first port and second port, wherein:
First port inserts jointly after first radio frequency path and first DC channel respectively and closes road port;
Second port inserts jointly after second radio frequency path and second DC channel respectively and closes road port;
Described each radio frequency path comprises band pass filter and is connected on the electric capacity of band pass filter both sides that wherein two shared same being capacitively coupled to of band pass filter are closed road port;
Described each DC channel comprises the low pass filter and the discharge tube of electric connection, and, two shared low pass filters of DC channel with close road port and electrically connect;
Described electric capacity is distributed constant formula electric capacity.
Described each electric capacity includes inner wire, insulator and sleeve, and insulator is set in the inner wire periphery, and sleeve then is set in the insulator periphery, and described sleeve is used for electrically connecting with the band pass filter of adjacency; Described inner wire is used for electrically connecting with the DC channel of adjacency, and and then is connected to each port of its adjacency.
Described insulator is a polytetrafluoroethylene film.
Described band pass filter includes some resonance posts, is provided with the backbone that is used to strengthen coupling effect between adjacent two resonance posts.
Corresponding two band pass filters of described circuit board are provided with and pass through the some tuning screw rod that circuit board gos deep into band pass filter, are used to regulate resonance frequency and coupling amount.
In described two band pass filters, first band pass filter adopts the mode of windowing to realize inductive coupled; The employing of second band pass filter flies the bar mode and realizes the capacitive coupling.
Described first and second band pass filters are near closing the shared resonance post in road port place.
Compared with prior art, the utlity model has following beneficial effect: the dual-frequency channel merger that the utility model is realized with band pass filter, utilize unique mode, realize the mutual isolation between DC channel and radiofrequency signal path.The application of distributed constant formula electric capacity makes and use product of the present utility model reduced volume greatly, and the utility model has been carried out layout to overall structure, and the improvement by structure has brought also that Insertion Loss is little, power capacity big, interchannel isolation advantages of higher.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the utility model product combination structural perspective;
Fig. 3 is the enlarged drawing of A part among Fig. 2;
Fig. 4 is the end face view of the utility model body part;
Fig. 5 is the direct current path printed circuit schematic diagram of circuit board among Fig. 2.
Embodiment
The utility model DCS/WCDMA dual-frequency channel merger is mainly used in 2G and 3G signal is closed the road, specifically sees also products in kind shown in Figure 2.
Among Fig. 2, mixer integral body is a casing, is made up of jointly body 6, circuit board 2 and lid 4.
The right edge of body 6 is provided with the first port Port2 and the second port Port3, be respectively applied for the radiofrequency signal that receives 1710-1880MHz and 1920-2170MHz, limit, body 6 left side then is provided with closes road port Port1, close road port Port1 exportable by first and second ports (Port2 and Port3) radiofrequency signal after synthetic, but or input signal shunt to first or second port (Port2 and Port3).
Integrated two radio frequency paths on the body 6, second radio frequency path that promptly is used to transmit first radio frequency path of DCS signal and is used to transmit the WCDMA signal, first radio frequency path is by the first port Port2, first electric capacity 68 ' (consulting Fig. 4), first band pass filter 610, the 3rd electric capacity 68, closes road port Port1 and electrically connects composition successively; Second radio frequency path is then by the second port Port3, second electric capacity 68 " (consulting Fig. 4), second band pass filter 620, the 3rd electric capacity 68, close road port Port1 and electrically connect composition successively.
As seen, each radio frequency path all independently comprises a band pass filter (610 or 620), and comprises described the 3rd electric capacity 68 jointly.
Each band pass filter 610 and 620 all adopts the mode of coaxial resonant cavity to constitute, comprise some resonance posts 611,621, as Fig. 2 and shown in Figure 4, the cavity that body 6 middle parts form is divided into two by the metallic plate 63 of an abnormity, corresponding first radio frequency path is first band pass filter 610, and corresponding second radio frequency path then is second band pass filter 620.The separation of metallic plate 63 makes first and second radio frequency paths have higher isolation.In first band pass filter 610, be provided with 7 resonance posts 611 in turn, wherein, the resonance post 611 of the contiguous first port Port2 electrically connects by lead and first electric capacity 68 ' and then with the first port Port2; Second band pass filter 620 is provided with 8 resonance posts 621 in turn, and resonance post 621 of its contiguous second port Port3 is by the lead and second electric capacity 68 " and then electrically connect with the second port Port3.It is shared that a contiguous resonance post 6012 that closes road port Port1 place belongs to first and second band pass filters 610 and 620, promptly in fact the resonance post total amount of two filters is 14, and the signal that this shared resonance post 6012 can make two band pass filters 610 and 620 transfers to jointly by lead 671 in the mode of electromagnetic resonance and closes road port Port1.
Fig. 2 and Fig. 4 as seen, the metallic plate 63 between described two band pass filters 610 and 620 does not cut off the contact of two band pass filters 610,620 fully.
Be to guarantee the isolation of WCDMA radio-frequency channel, the mode that pairing first band pass filter, 610 usefulness are windowed added two inductive coupled, common property is given birth to two inhibition limits in passband right-hand member and WCDMA passband.
For guaranteeing the isolation of DCS radio-frequency channel, the mode that pairing second band pass filter, 620 usefulness fly bar 628 has been added two capacitive couplings, and common property is given birth to two inhibition limits in passband left end and DCS passband.
See also Fig. 2, Fig. 3 and Fig. 4, described first, second and the 3rd electric capacity 68 ', 68 "; 68, its structure all specifically comprises inner wire 683, insulator 682 and sleeve 681 with the 3rd electric capacity 68, the three electric capacity 68; insulator 682 is set in inner wire 683 peripheries; 681 in sleeve is set in insulator 682 peripheries, and insulator 682 usefulness dielectric films realize that dielectric film adopts polytetrafluoroethylene.Described sleeve 681 electrically connects with the common resonant post 6012 of described first and second band pass filters 610 and 620, and 683 of described inner wires are connected directly to and close road port Port1.So, can form distributed constant formula electric capacity by insulator 682 insulation between sleeve 681 and the inner wire 683, for two radio frequency paths, radiofrequency signal is by the transmission of the coupling realization signal of 681 in inner wire 683 and sleeve; For two DC channel, be directly connected to inner wire 683, and direct current can not pass through sleeve 681, so just realized that radio frequency path cuts off the effect of direct current.
As previously mentioned, first and second electric capacity 68 ', 68 " adopt as structure that the 3rd electric capacity 68 is identical; but the sleeve of first electric capacity 68 ' only with first band pass filter 610 be connected second electric capacity 68 with the adjoining first resonance post 611 of first electric capacity 68 ' " sleeve then with second band pass filter 620 with second electric capacity 68 " adjoining first resonance post 621 be connected.
The inner wire of described each electric capacity is from each port Port1, Port2, and Port3 draws, and therefore, nature electrically connects with each port.
Please consult Fig. 2 again, be fixed with a printed circuit on the described circuit board 2, the circuit of printing as shown in Figure 5, occupy circuit board 2 both sides main the branch, has been known technology about the DC channel of dual-frequency channel merger, only is described below with regard to main improvement of the present utility model at this:
In conjunction with Fig. 1, Fig. 2 and Fig. 5, integrated two DC channel on the circuit board 2, i.e. first DC channel and second DC channel, DC channel are mainly by low pass filter 201,202, and 203, composition such as switch, lightning protection component 205.The first/the second DC channel after the first/the second port Port2/Port3 picks out signal, carry out filtering by the first/the second low pass filter 202/203 after, synthesize, and export the 3rd low pass filter 201 to, export to again and close road port Port1.Low pass filter 201,202,203 effect are mainly used in the inhibition high-frequency signal and allow the control signal that is lower than 3MHz pass through.In addition, can in two DC channel, switch be set, be used for selecting whether to need direct current to pass through according to needs; The lightning protection component 205 of discharge tube and so on can also be set.
The printed circuit of Fig. 5 there is shown the access point 281,282,283 of 3 low pass filters 201,202,203, and described 3 low pass filters 201,202,203 all independently are arranged on 3 strutting pieces.As shown in Figure 2, near each port Port1, Port2, Port3, at the upper limb of two band pass filters 610,620, described 3 strutting pieces 641,642 are set respectively, 643 (consulting Fig. 4) are provided with described low pass filter 201,202,203 on each strutting piece.
Described low pass filter 201,202,203 1 terminations are adjacent near port Port1, Port2, the electric capacity of Port3, particularly, this end of the 3rd low pass filter 201 and the inner wire of the 3rd electric capacity 68 683 electrically connect, this end of first low pass filter 202 and the inner wire of first electric capacity 68 ' electrically connect, this end of second low pass filter 203 then with second electric capacity 68 " inner wire electrically connect.Low pass filter 201,202,203 the other end then be reserved with printed circuit diagram shown in Figure 5 in access point 281,282,283 contacted contacts 26, and circuit board 2 is provided with 3 perforates of corresponding 3 contacts 26, and so, 3 contacts 26 are inserted in 3 perforates of circuit board 2, just can realize setting firmly of circuit board 2 and body 6, at this moment, 3 of printed circuit shown in Figure 5 access points 281,282,283 just with 3 strutting pieces on 3 low pass filters 201,202,203 contact 26 engages, and also makes low pass filter 201,202,203 successfully insert affiliated DC channel, and circuit board and strutting piece upper surface are reserved and be not less than 0.2 mm clearance, can guarantee the good electrical properties of radiofrequency signal.
Described switch adopts the metal magnetic bead 204 that is welded on the circuit to realize, be used to suppress high-frequency signal, the printed circuit of magnetic bead institute corresponding position is interrupted, at this groove that cooperates the magnetic bead sphere can also be set, remove the connection that magnetic bead 204 can disconnect front and back, but insert 204 restore circuits of magnetic bead.
As shown in Figure 2, described the 3rd low pass filter 201 is to be connected the back with the inner wire 683 of described the 3rd electric capacity 68 by lead 272 to realize electrically connecting with closing road port Port1, and second, third low pass filter 202,203 also in like manner.So just ingenious DC channel and the common technical problem of closing road port Port1 that inserts of radio frequency path of having realized.
Again as shown in Figure 2, two band pass filters 610 of the corresponding body 6 in circuit board 2 both sides and 620 also are provided with 29 tuning screw rods 69.Tuning screw rod 69 passes described circuit board 2, can go deep into the inside of two band pass filters 610,620 when circuit board 2 and body 6 set firmly, and is mainly used in the resonance frequency and the coupling amount of the harmonic oscillator of regulating two band pass filters 610 and 620.
In order to realize the close coupling between the resonance post 611, also be provided with backbone between adjacent two resonance posts 611 in two band pass filters 610 and 620, the height of each backbone does not wait, and visual actual conditions are regulated.2 of resonance post and circuit boards leave appropriate gap, are advisable to be not less than 1.5 millimeters, to satisfy the demand of power capacity.
Please consult Fig. 2 again, also shown is described lid 4, this lid 4 is used for covering mutually with body 6, and inner body is protected, and its periphery can be added a cover cushion rubber, so that strengthen its water resistance, and the protection internal circuit.Also be provided with through hole on these circuit board 2 surfaces, and on this through hole, Ge Er ventilated membrane 40 be set, be used to keep the inside and outside pressure balance of body 6, in addition, splash guard 41 also is set on this through hole with protection Ge Er ventilated membrane 40.
In addition, described two band pass filter 610,620 inner surfaces are silver-plated, can reduce the decay of radiofrequency signal in transmission course greatly, and the insertion loss that makes signal in the passband is less than 0.3dB.
Design of the present utility model is not limited to the DCS/WCDMA co-space feedback system, can also be adapted to co-space feedback system such as 2G/3G, its main points are to adopt the distributed constant formula electric capacity related as above-mentioned embodiment, concrete shape and concrete layout about casing, can make suitable change according to spirit of the present utility model, therefore the utility model also is applicable to general dual-frequency combiner, is adapted to multiple co-space feedback system.
In sum, the utility model has overcome the deficiencies in the prior art, after the electrical structure of mixer and physical structure have been carried out whole organic adjustment, has brought following good effect:
Volume is little: the big I of mixer of the present utility model is contracted to 218mm*145.5mm*51mm.Telescopic coupled structure has made full use of closes that inner wire passes the space of inner body wall among the road port Port1, has both realized the coupling of radiofrequency signal, again the occupying volume external space not.Add the lumped parameter low pass filter at DC feedback path and radiofrequency signal path, both guaranteed the isolation between DC feedback path and radiofrequency signal path, the size of the PCB circuit board of circuit board is reduced greatly.
Isolation height:, improved interchannel isolation so greatly because each radio frequency path is the wave-guide cavity wave structure of sealing.The first port Port2 to the isolation of the radiofrequency signal of 1710-1880MHz frequency range, the second port Port3 to the isolation of the radiofrequency signal of 1920-2170MHz frequency range all greater than 50dB,
Power capacity is big: leave enough gaps between resonance post in the coaxial cavity and coaxial cavity body wall, improved device radiofrequency signal power bearing ability, the average power that every port bears is up to 250 watts.
Claims (20)
1. DCS/WCDMA dual-frequency channel merger, handle on the road of closing that is used to finish different frequency band signals, comprise and close road port, first port and second port, the first/the second port inserts jointly after radio frequency path and DC channel respectively and closes road port, described each radio frequency path comprises band pass filter and is connected on the electric capacity of band pass filter both sides that wherein two shared same being capacitively coupled to of band pass filter are closed road port; Described each DC channel comprises the low pass filter and the discharge tube of electric connection, and, two shared low pass filters of DC channel with close road port and electrically connect;
It is characterized in that:
This mixer also comprises casing, and casing comprises body, circuit board and lid, and two band pass filters are arranged in the body and by metallic plate and separate mutually, and the body outside sets firmly described each port, and each electric capacity places in two band pass filters; Bodies top also is provided with some strutting pieces, the described low pass filter of installing on the strutting piece, and described discharge tube and switch then are fixed on this circuit board; Described lid and body locking.
2. DCS/WCDMA dual-frequency channel merger according to claim 1 is characterized in that: described each electric capacity is distributed constant formula electric capacity.
3. DCS/WCDMA dual-frequency channel merger according to claim 2, it is characterized in that: described each electric capacity includes inner wire, insulator and sleeve, insulator is set in the inner wire periphery, and sleeve then is set in the insulator periphery, and described sleeve is used for electrically connecting with the band pass filter of adjacency; Described inner wire is used for electrically connecting with the DC channel of adjacency, and and then is connected to each port of its adjacency.
4. DCS/WCDMA dual-frequency channel merger according to claim 3 is characterized in that: described insulator is a polytetrafluoroethylene film.
5. according to any described DCS/WCDMA dual-frequency channel merger in the claim 1 to 4, it is characterized in that: described band pass filter includes some resonance posts, is provided with the backbone that is used to strengthen coupling effect between adjacent two resonance posts.
6. DCS/WCDMA dual-frequency channel merger according to claim 5 is characterized in that: corresponding two band pass filters of described circuit board are provided with and pass through the some tuning screw rod that circuit board gos deep into band pass filter, are used to regulate resonance frequency and coupling amount.
7. DCS/WCDMA dual-frequency channel merger according to claim 6 is characterized in that: in described two band pass filters, first band pass filter adopts the mode of windowing to realize inductive coupled; The employing of second band pass filter flies the bar mode and realizes the capacitive coupling.
8. DCS/WCDMA dual-frequency channel merger according to claim 7 is characterized in that: described first and second band pass filters are near closing the shared resonance post in road port place.
9. DCS/WCDMA dual-frequency channel merger according to claim 8 is characterized in that: first port and the resonance post number of closing the band pass filter between the road port are 7; Second port and the resonance post number of closing the band pass filter between the road port are 8.
10. DCS/WCDMA dual-frequency channel merger according to claim 9, it is characterized in that: described DC channel also comprises switch, printed wire in the DC channel is provided with some places to be interrupted, and discontinuities is provided with groove, and groove is provided with the metal magnetic bead alternatively to realize on-off action.
11. the DCS/WCDMA dual-frequency channel merger according to described in the claim 10 is characterized in that: leave between described strutting piece upper surface and the circuit board bottom surface and be not less than 0.2 mm clearance.
12. DCS/WCDMA dual-frequency channel merger according to claim 11 is characterized in that: described lid offers through hole, this through hole is coated with the Ge Er ventilated membrane.
13. DCS/WCDMA dual-frequency channel merger according to claim 12 is characterized in that: the through hole of described lid is provided with protective plate.
14. general dual-frequency combiner, handle on the road of closing that is used to finish different frequency band signals, comprise and close road port, first port and second port, it is characterized in that: the first/the second port inserts jointly after radio frequency path and DC channel respectively and closes road port, described each radio frequency path comprises band pass filter and is connected on the electric capacity of band pass filter both sides that wherein two shared same being capacitively coupled to of band pass filter are closed road port; Described each DC channel comprises the low pass filter and the discharge tube of electric connection, and, two shared low pass filters of DC channel with close road port and electrically connect; Described each electric capacity is distributed constant formula electric capacity.
15. general dual-frequency combiner according to claim 14, it is characterized in that: described each electric capacity includes inner wire, insulator and sleeve, insulator is set in the inner wire periphery, and sleeve then is set in the insulator periphery, and described sleeve is used for electrically connecting with the band pass filter of adjacency; Described inner wire is used for electrically connecting with the DC channel of adjacency, and and then is connected to each port of its adjacency.
16. general dual-frequency combiner according to claim 15 is characterized in that: described insulator is a polytetrafluoroethylene film.
17. according to any described general dual-frequency combiner in the claim 14 to 16, it is characterized in that: described band pass filter includes some resonance posts, is provided with the backbone that is used to strengthen coupling effect between adjacent two resonance posts.
18. general dual-frequency combiner according to claim 17 is characterized in that: corresponding two band pass filters of described circuit board are provided with and pass through the some tuning screw rod that circuit board gos deep into band pass filter, are used to regulate resonance frequency and coupling amount.
19. general dual-frequency combiner according to claim 18 is characterized in that: in described two band pass filters, first band pass filter adopts the mode of windowing to realize inductive coupled; The employing of second band pass filter flies the bar mode and realizes the capacitive coupling.
20. general dual-frequency combiner according to claim 19 is characterized in that: described first and second band pass filters are near closing the shared resonance post in road port place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200517738U CN201044257Y (en) | 2007-05-23 | 2007-05-23 | DCS/WCDMA double-frequency combiner and general double-frequency combiner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200517738U CN201044257Y (en) | 2007-05-23 | 2007-05-23 | DCS/WCDMA double-frequency combiner and general double-frequency combiner |
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| Publication Number | Publication Date |
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| CN201044257Y true CN201044257Y (en) | 2008-04-02 |
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| CNU2007200517738U Expired - Lifetime CN201044257Y (en) | 2007-05-23 | 2007-05-23 | DCS/WCDMA double-frequency combiner and general double-frequency combiner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101312355B (en) * | 2007-05-23 | 2012-05-09 | 京信通信系统（中国）有限公司 | DCS/WCDMA double-frequency combiner and general double-frequency combiner |
-
2007
- 2007-05-23 CN CNU2007200517738U patent/CN201044257Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101312355B (en) * | 2007-05-23 | 2012-05-09 | 京信通信系统（中国）有限公司 | DCS/WCDMA double-frequency combiner and general double-frequency combiner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080402 Effective date of abandoning: 20070523 |