CN219959382U - 5G-R high-rejection low-loss multichannel filter - Google Patents
5G-R high-rejection low-loss multichannel filter Download PDFInfo
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- CN219959382U CN219959382U CN202321017104.4U CN202321017104U CN219959382U CN 219959382 U CN219959382 U CN 219959382U CN 202321017104 U CN202321017104 U CN 202321017104U CN 219959382 U CN219959382 U CN 219959382U
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Abstract
The utility model provides a 5G-R high-rejection and low-loss multichannel filter, which adopts single-sided cavity arrangement with a high duplexer, wherein the high duplexer comprises a TX channel and an RX channel, the TX channel adopts a TE mode dielectric resonator, the working frequency is 1965-1975 MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, the out-of-band rejection is more than 30@1920-1945MHz, and more than 90@2155-2165MHz; the RX channel has the working frequency of 2155-2165MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, and the out-of-band rejection is more than 20@2110-2145MHz and more than 57@2170-2210MHz. The utility model combines the metal resonator and the TE dielectric resonator to apply the design, reduces the insertion loss, improves the Q value, reduces the process complexity and improves the out-of-band inhibition degree.
Description
Technical Field
The utility model relates to the field of filters, in particular to a 5G-R high-rejection and low-loss multichannel filter.
Background
With the rapid development of communication technologies, particularly satellite technologies, performance requirements of communication systems are also increasing. Therefore, there is a high demand for new microwave devices and performance improvement, and the microwave filter, as an indispensable component in wireless communication, especially a cavity filter widely applied to a mobile communication base station or an indoor distribution system, must also be adapted to the new demand.
The metal resonators have the advantages of relatively low material price, simple processing of metal parts and conventional production process basically meeting the production requirements of the filter, but the metal resonators are difficult to apply to some filters requiring ultralow transmission loss due to relatively low quality factors; the TE mode dielectric resonator can realize some filters requiring ultra-low transmission loss due to high quality factor, but the TE mode dielectric resonator is generally high in price due to the special material and the limitation of production process, so that the TE mode dielectric resonator is difficult to use in a large range
Disclosure of Invention
The utility model provides a 5G-R high-rejection and low-loss multichannel filter, which aims to solve the problems in the prior art, and combines a metal resonator and a TE dielectric resonator to be applied and designed, so that the insertion loss is reduced, the Q value is improved, the process complexity is reduced, and the out-of-band rejection degree is improved.
The utility model adopts single-sided cavity arrangement with a high-duplex device, wherein the high-duplex device comprises a TX channel and an RX channel, the TX channel adopts a TE mode dielectric resonator, the working frequency is 1965-1975 MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, the out-of-band rejection is more than 30@1920-1945MHz, and more than 90@2155-2165MHz; the RX channel has the working frequency of 2155-2165MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, and the out-of-band rejection is more than 20@2110-2145MHz and more than 57@2170-2210MHz.
Further improved, the single-sided cavity arrangement adopts a single-sided metal cavity structure, and the uplink passband F UL =1965 to 1975MHz; the downlink passband is F DL =2155～2165MHz。
Further improved, the radiating teeth are distributed in the single-sided cavity.
Further improvement, the thickness of the radiating teeth in the single-sided cavity row is 10mm; the thickness of the bottom of the cavity is 2mm; depth of cavity: 20mm; the thickness of the tuning cover plate is 2mm; nut reservation height: 4.0mm; the height of the waterproof edge is 7mm, and the total thickness is 45mm.
The utility model has the beneficial effects that:
1. by combining the metal resonator and the TE dielectric resonator, the insertion loss is reduced, the Q value is improved, the process complexity is reduced, the out-of-band suppression degree is improved, and the cost is reduced.
2. The 5G-R frequency band has good propagation characteristics and is suitable for deploying a railway 5G private network system. The electromagnetic interference of the China Unicom LTE system and the Tiantong satellite communication system in adjacent frequency bands is avoided by additionally arranging the 5G-R high-suppression and low-loss multichannel filter on the railway base station, and the method has engineering feasibility and long-term benefits.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a metal cavity according to the present utility model.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The 5G-R high-rejection and low-loss multichannel filter is an anti-blocking interference type filter, which isolates the rejection of signals of a non-5G-R system and avoids various interferences generated by a public mobile communication network to the 5G-R communication network.
Based on the characteristics of 5G-R and the practical requirements of service application, in order to ensure the communication quality of the whole system in a frequency interval, the interference signals are reasonably and effectively controlled, but the electromagnetic interference of the China Unicom LTE system and the space-time satellite communication system with adjacent frequency bands is fully considered. In order to avoid the interference of the railway base station to the adjacent satellite frequency bands, the 5G-R high-rejection and low-loss multichannel filter is used for filtering out-of-band signals, so that interference signals generated by intermodulation between the signals are avoided, frequency components in a certain range can normally pass, and frequency components in other ranges are attenuated to an extremely low level. The main technical difficulty is that the requirement on the downlink inhibition degree is very high, the insertion loss is low, so that the product design scheme needs to adopt a high-duplex device to adopt single-sided cavity arrangement, the TX channel adopts a TE mode dielectric resonator to improve the Q value, the insertion loss is reduced, and the low-pass metal cavity filter is increased to ensure the far-end inhibition. The main technical indexes are as follows:
| project | RX | TX |
| Operating frequency | 1965~1975MHz | 2155~2165MHz |
| Insertion loss (dB) | ≤0.8 | ≤0.8 |
| In-band fluctuation (dB) | ≤0.5 | ≤0.5 |
| Return loss (dB) | ≥20 | ≥20 |
| Out-of-band rejection (dB) | ＞30@1920-1945MHz＞90@2155-2165MHz | ＞20@2110-2145MHz＞57@2170-2210MHz |
The 5G-R high-rejection and low-loss multichannel filter adopts a single-sided metal cavity structure, and an uplink passband F UL =1965 to 1975MHz; the downlink passband is F DL =2155 to 2165MHz. The out-of-band suppression of an uplink receiving passband is mainly considered for the 5G-R base station, and uplink channel interference is eliminated, so that the out-of-band suppression requirement of the uplink passband of a 5G-R base station filter is high, the requirement on the downlink passband is mainly low in-band interpolation loss, the out-of-band suppression requirement is high, and the field intensity coverage of the base station and the strong interference caused by the space-time satellite signals cannot be influenced.
The rectangular coefficient of the 5G-R high-rejection and low-loss multichannel filter is related to insertion loss, namely the steeper the edge is, the larger the insertion loss is, the stronger the received signal is in the place where the interference of the base station is larger, the noise coefficient of the equipment is secondary, the out-of-band rejection is high as a main index, but the transmission power cannot be influenced for the downlink transmission signal of the base station, so the insertion loss is low as a main index.
The structure of the product is shown in figure 1, and the design is carried out by adopting a single-sided metal cavity scheme according to the technical index requirement. The thickness of the cavity radiating teeth is 10mm; the thickness of the bottom of the cavity is 2mm; depth of cavity: 20mm; the thickness of the tuning cover plate is 2mm; nut reservation height: 4.0mm; the height of the waterproof edge is 7mm, and the total thickness is 45mm.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the equipment examples, what has been described above is merely a preferred embodiment of the utility model, which, since it is substantially similar to the method examples, is described relatively simply, as relevant to the description of the method examples. The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, since modifications and substitutions will be readily made by those skilled in the art without departing from the spirit of the utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (4)
1. A5G-R high-rejection and low-loss multichannel filter is characterized in that: adopting single-sided cavity arrangement with a high-duplex device, wherein the high-duplex device comprises a TX channel and an RX channel, the TX channel adopts a TE mode dielectric resonator, the working frequency is 1965-1975 MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, the out-of-band rejection is more than 30@1920-1945MHz, and more than 90@2155-2165MHz; the RX channel has the working frequency of 2155-2165MHz, the insertion loss is less than or equal to 0.8dB, the in-band fluctuation is less than or equal to 0.5dB, the return loss is more than or equal to 20 dB, and the out-of-band rejection is more than 20@2110-2145MHz and more than 57@2170-2210MHz.
2. The 5G-R high rejection, low loss multi-channel filter of claim 1, wherein: the single-sided cavity arrangement adopts a single-sided metal cavity bodyStructure, upstream passband F UL =1965 to 1975MHz; the downlink passband is F DL =2155～2165MHz。
3. The 5G-R high rejection, low loss multi-channel filter according to claim 1 or 2, characterized in that: and radiating teeth are distributed in the single-sided cavity.
4. A 5G-R high rejection, low loss multi-channel filter according to claim 3, characterized in that: the thickness of the radiating teeth in the single-sided cavity row is 10mm; the thickness of the bottom of the cavity is 2mm; depth of cavity: 20mm; the thickness of the tuning cover plate is 2mm; nut reservation height: 4.0mm; the height of the waterproof edge is 7mm, and the total thickness is 45mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321017104.4U CN219959382U (en) | 2023-04-28 | 2023-04-28 | 5G-R high-rejection low-loss multichannel filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321017104.4U CN219959382U (en) | 2023-04-28 | 2023-04-28 | 5G-R high-rejection low-loss multichannel filter |
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| Publication Number | Publication Date |
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| CN219959382U true CN219959382U (en) | 2023-11-03 |
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| CN202321017104.4U Active CN219959382U (en) | 2023-04-28 | 2023-04-28 | 5G-R high-rejection low-loss multichannel filter |
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- 2023-04-28 CN CN202321017104.4U patent/CN219959382U/en active Active
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