Cavity Duplexer

Cavity FilterFeaturesVarious size & Wide FrequencyLow insertion lossPrevent impactExcellent temperature stability Application FieldVarious size & Wide FrequencyLow insertion lossPrevent impactExcellen

Product Details
The organization keeps on the procedure concept 'scientific management, high quality and efficiency primacy, purchaser supreme' for China Dielectric Resonator_TE Mode, China Dielectric Filter_MONO Type, Ceramic Waveguide Filter-high Power factory. Our management philosophy is refinement, specialization, humanization and scale. We always carry on the production with high standard and strict requirements, control the quality and prevent the defective products from leaving the factory, so as to ensure the stable performance of the products! To achieve our goals, we must keep employees enthusiastic about participation and be ready at all times.


Cavity Filter

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Features
Diplexer is the main accessory of hetero-frequency diplexer station and relay station. Its function is to isolate the transmitting and receiving signals, so as to ensure the receiving and transmitting can work normally at the same time.The Cavity Duplexer is composed of two bands of band-stop filters of different frequencies to prevent the local transmission of signals to the receiver. The general diplexer consists of six band-stop filters (notch filters), each resonating at the transmitting and receiving frequencies. The filter at the receiving end resonates the transmitting frequency and prevents the transmitting power from being strung into the receiver, while the filter at the transmitting end resonates at the receiving frequency. Some duplexer don't mark the launch and the receiving end and the only LOW and HIGH, such as a duplexer LOW = 450, HIGH = 460, said the LOW end can join 450 million 460 million transmitter, receiver HIGH end connection can also be will join 450 million transmitter LOW end, HIGH end connection 460 million receiver, sending and receiving frequency can be used upside down, but cannot meet the set will launch frequency 460 machine duplexer 450 million end so as not to damage the radio and duplexer. The diplexer is a special bidirectional three terminal filter. It not only needs to couple the weak receiving signal in, but also needs to feed the large transmitting power to the antenna, and requires the two to complete their respective functions without affecting each other. General duplexer consists of spiral cavity body, due to its high working frequency, distribution parameters influence often make it a gland body, all the signal feeder with good shielding effect of the coaxial cable of the cavity shape material also requires a certain degree of finish, is good for heat dissipation, appearance is often black, three commonly used standard high frequency signal end connectors Q9 or L16 type high frequency wireless communication requirement for duplexer socket. The operating frequency range of the diplexer shall not be narrower than that of the radio telephone itself. In general, the bandwidth refers to the input bandwidth of the receiver and the output bandwidth of the transmitter after the wireless telephone is equipped with a duplex. For a diplexer, it is the stopband bandwidth of two equivalent band-stop filters, rather than the passband bandwidth. As can be seen from its frequency response curve, it is the frequency range of the two stopbands at a certain attenuation. As is known to all, for today's VHF and UHF wireless telephones, the high-frequency input bandwidth of the receiver is generally above 5MHz, while the high-frequency output bandwidth of the transmitter is above 10MHz. That is to say, the high frequency input and output bandwidth of the wireless telephone itself is relatively wide, so the bandwidth of the duplexer is required to have a certain width, in order to overcome the trouble caused by the bandwidth problem when the user declares the frequency. However, according to the regulations of the radio frequency management departments in China and other countries in the world, a duplex wireless telephone set used as a dual-frequency duplex network has a transmitter-receiver frequency difference of 5.7mhz at 150MHz and 10MHz at 450MHz at 150MHz. Therefore, the ideal diplexer can only be half of the transceiver frequency difference specified by the corresponding frequency band of wireless telephone, that is, 150MHz is 2.85mhz and 450MHz is 5MHz.


Application Field
Our Cavity Duplexer has many advantages such as various size, wide frequency and low insertion loss.In the meantime,  it can also prevent impact and has excellent temperature stability. Due to its small size and light weight, it is used for mobile communication and as an unattended turntable in the field. However, the space provided by vehicle-mounted wireless telephone and automobile is limited, and the wiring and heat dissipation of the wireless telephone need to be considered. Therefore, the miniaturization of the duplexer is very necessary on the premise of meeting other technical indexes. Secondly, diplexers must be easy to install, especially for some diplexers and wireless phones. And should be solid, reliable, compact structure, should be able to withstand a certain impact and vibration, especially for some poor geographical environment of the local radio telephone. As we know, most current diplexers are required by distributed parameters to determine their working frequency and other indexes. If the structure of the diplexer cannot be adjusted, it may lead to the deterioration of the whole machine index of the wireless telephone, or even burn out the receiver. This is particularly important. Moreover, as a medium turntable sometimes use environment is quite harsh, which requires that the duplexer can also ensure the quality of communication within the corresponding operating temperature range. Generally speaking, the diplexer should have a clear operating temperature range and a stability index of temperature change, so as to meet the requirements of the whole machine. The debugging of the duplex refers to that the duplex should confirm whether the working frequency is consistent with the working frequency of the wireless telephone before the whole machine is tuned. If there is a big difference, it should be adjusted and adjusted again to avoid burning out the input high-amplifier circuit. In the debugging stage of the whole machine, after the circuit board of transceiver is adjusted, the duplexer should be carefully fine-tuned to maximize the transmission power and minimize the deterioration of transmission and reception sensitivity. Watch out for small, slow adjustments to prevent satellite TV from burning out. Because the diplexer operates at a high frequency and is a component whose characteristics are determined by distributed parameters, it is very sensitive to adjustment. And to prevent the adjustment after the lock, in the process of the original adjustment of the best point to run. Some duplicators use self-locking screws, do not have to use additional nuts to lock, so that debugging is very convenient, and save the man-hour cost. The purpose of adjusting the diplexer is to delete the transmitting signals between the antenna and the receiving circuit, and at the same time to achieve the minimum pass-band signal decay between the antenna and the receiving circuit. The steps of adjustment and test are as follows: first, the high-frequency signal generator outputs the high-frequency point, and the low-pass screw of the diplex is adjusted to slowly weaken the signal received by the receiver, so that the output of the signal generator will not lead to the saturation of the receiver. If necessary, the output of the high frequency signal generator can be gradually enhanced. Meanwhile, the receiver can be adjusted to the critical noise-quiet receiving state. Then, the position of the load and the receiver is exchanged, the signal generator outputs low-frequency points, while the receiver receives low frequency points. The high-pass screw of the diplexer is adjusted to weaken the signal received by the receiver slowly, so that the signal generator output will not lead to receiver saturation. If necessary, the output of high frequency signal generator can be enhanced. The process can be repeated several times to achieve the best isolation of the diplexer. Its function is to isolate the transmitting and receiving signals, so that both can work normally at the same time. The diplexer not only needs to couple the weak receiving signal in, but also needs to feed the large transmitting power to the antenna, and requires the two to complete their respective functions without affecting each other. Therefore, debugging is very important. The duplexer belongs to the filter for communication equipment, and belongs to the class of sound meter filter. The main function is to isolate the transmitting and receiving signals, so as to ensure that the frequency of the transmitting signal and the frequency of the receiving signal do not interfere with each other. Internally, there are two groups of band-stop filters, and the frequencies of the two groups of filters are different from each other, so as to realize the non-interference between the sending frequency and the receiving frequency. Because it works in both directions, it is called a duplexer.


Specifications


Part NumberCenter FrequencyBandwidthInsertion Loss in BWRipple in BWReturn Loss in BWAttenuation(dB)Size
       (L x W x H)mm
PDF
SRP875F4R10HA875104.01.51460@825~83570x36x15.5Download
40@930~960
35@1805~2145
SRP902N10N25HA902.5253.01.01555@935~96060x40x20Download
SRP945F4R30HA945304.01.51450@825~87070x36x15.5Download
35
1805~2145
SRP947N8N25HA947.5252.00.81535@890~91560x40x20Download
SRP1105N10N32HA1105323.51.51460@1065~114560x40x20Download
SRP1200F4R50HA1200503.01.01530@1090

70x36x15.5Download
SRP1300F4R50HA1300503.01.01550@1090

70x36x15.5Download
SRP1400F4R50HA1400503.01.01550@1090

70x36x15.5Download
SRP1680F5R80HA1680805.51.51430@1600&176051.35x23.2x13Download
SRP1827F4R45HA1827.5453.01.51460@885~96070x36x15.5Download
60@2110~2145
SRP1950K8N60HA1950603.02.01850@2110~217070x36x15.5Download
SRP2017F4R15HA2017152.50.5235@DC~184270x36x15.5Download
30@1842~1929
15@1929~1978
15@2090~2100
SRP2441N6N83HA2441832.01.01842@2360

41x35.5x17Download
40@2300~2358.5
10@2523

SRP827F872N10N15HA827.5151.50.817.055@865~88096x46x21Download
872.5151.50.817.055@820~835
SRP454F462N10N02HA45423.52.015.010@458

100x50x20Download
40@462

46223.52.015.010@458

40@454

SRP813F900N10N15-30HA813.5153.01.014.050@885~91582x64x15Download
50@851~866
900303.01.014.050@806~821
38@930~960
SRP813F858N10N15HA813.5152.00.816.055@851~86682x64x15Download
35@836

858.5152.00.616.055@806~821
35@836

SRP834F879N10N22HA834222.01.018.060@868~89082x64x15Download
879222.01.018.060@823~845
SRP1770F1865N10N30HA1770303.01.015.550@1850~188082x64x15Download
15@1735

1865303.01.015.550@1755~1785
20@1830

SRP858F945N10N15-30HA858.5153.01.014.050@930~96082x64x15Download
30@806~821
945303.01.514.050@851~866
50@885~915
SRP1950F2140N10N60HA1950601.81.018.055@2110~217082x64x15Download
2140601.81.018.055@1920~1980
SRP897F942N10N24HA897242.21.014.050@930~95482x64x17Download
942242.21.014.050@885~909
SRP900F945N10N30HA900302.51.518.045@930~960100x55x18Download
945302.51.518.045@885~915
SRP912F957N10N06HA91261.50.817.055@954~96096x46x21Download
95761.50.817.055@909~915
SRP1732F1955N10N45-30HA1732.5452.00.818.055@1940~197082x64x15Download
50@1805~1850
1955302.00.818.055@1710~1755
35@2130~2160
SRP1827F2145N10N45-30HA1827.5452.00.818.055@2130~216082x64x15Download
33@1710~1755
2145302.00.818.055@1805~1850
48@1940~1970
SRP1745F1840N10N20HA1745202.21.015.555@1830~185082x64x15Download
1840202.21.015.555@1735~1755
SRP1747F1842N10N75HA1747.5753.02.014.045@1805~188082x64x15Download
1842.5753.02.014.045@1710~1785
SRP1795F2045N10N170-250HA17951701.81.012.030@1920~217060x33x17Download
20452501.81.312.030@1710~1880
SRTP12Q1920F4D925HA922752.01.01445@1710~1845105x74.2x28Download
45@1920~2170
17951703.01.01450@885~960
45@1920~2170
20452503.01.21450@885~960
45@1710~1845
SRTP8J1840F4D830HA830103.51.01450@1710~175582x64x17Download
50@1940~1955
1732453.01.01450@825~835
50@1940~1955
1947153.01.01450@825~835
50@1710~1755
SRTP8J919F8F1952HA897242.50.81845@930~96085x64.6x18Download





942242.50.81845@885~915





19521452.00.61815@DC~1850
30@2110~3600
SRTP3D917L12L1917FHA917552.01.01840@1710~1860105x80x28Download
40@1950~2150
17851502.51.21540@890~945
40@1950~2150
20502002.51.21540@890~945
40@1710~1860
SRMP8J1792F8J1792RHA1745202.21.01450@1830~1850105x73.8x22Download
1840206.01.01450@1735~1755
1745202.21.01450@1830~1850
SRMP6J866F6J1848FHA830104.01.01540@890~91585x57x18Download
35@1710~1785
40@1920~1980
902254.02.01540@825~835
35@1710~1785
40@1920~1980
1747754.02.51540@825~835
40@890~915
40@1920~1980
1950604.01.01540@825~835
40@890~915
35@1710~1785
SRMP10L1848F10L1991FHA1747758.01.51450@1920~198093x74.6x20Download
1950608.01.51450@1710~1785
1842758.01.51450@2110~2170
2140608.01.51450@1805~1880
SRMP10L1795F10L2045FHA1745758.01.51440@1805~188093x74.6x20Download
10@1700

20@1690

1842758.01.51440@1710~1785
8@1890

10@1900

1950608.01.51450@2110~2170
30@2045

10@1910

2140608.01.51450@1920~1980
30@2045

8@2180

SRMP8J916F8J1992FHA875102.51.01845@954~960141.6x80x20Download
40@1830~1850
40@2130~2160
95762.51.01850@870~880
40@1830~1850
40@2130~2160
1840203.51.01850@870~880
50@954~960
40@2130~2160
2145303.51.01850@870~880
50@954~960
45@1830~1850
SRMP8J908F8J2074F4D1895HA872153.01.01730@825~835141.59x92.24x20Download
45@930~960
45@1880~2150
945303.01.01740@825~870
45@885~915
45@1880~2150
1895303.01.01745@820~960
45@2110~2150
35@2010~2025
2130404.01.01745@1880~1910
45@1920~1960
40@2010~2025
2017154.01.01635@1920~1960
45@1880~1910
45@2110~2150
SRTP8J825F8J1816F4D2017HA900303.01.51440@1710~1755141.6x80x20Download
40@1880~1920
40@2010~2025
1732253.01.01450@885~912
50@1880~1920
45@2010~2025
1900403.01.01450@885~915
50@1710~1755
35@2010~2025
2017154.01.01450@885~915
45@1710~1755
35@1880~1920
SRMP8J859F8J1920FHA836.5252.51.01653@839~89497x60x19Download
50@1850~1910
50@1960~1990
881.5252.51.01653@854~849
50@1850~1910
50@1930~1990
1880604.22.21560@1930~1990
55@824~849
50@869~894
1960604.22.21560@1850~1910
60@824~849
50@869~894
SRMP8J871F8J1850FHA83062.51.01853@909~915141.6x80x20Download
50@1735~1755
50@1940~1970
91262.51.01853@825~835
50@1735~1755
50@1940~1970
1745203.51.01860@1940~1970
55@825~835
50@909~915
1955303.51.01860@1735~1755
60@825~935
50@909~915
SRMP8J872F8J1848FHA847302.51.01540@700

120x75x20Download
45@950~3000
897.5352.51.01545@750

45@1100~3000
1747.5752.51.01545@1600

40@2000~3000
1950602.51.01545@1800

40@2100~3000
SRMP8J907F8J1991HA872.5433.01.51450@925~96097x60x19Download
45@1805~1880
45@2110~2170
942.5353.01.51480@851~894
45@1805~1880
45@2110~2170
1842.5752.51.01450@2110~2170
50@851~894
50@925~960
2140602.51.01450@1805~1880
50@851~894
50@925~960
SRMP8J807F8J2047F2593HA742.5293.01.01550@851~894112x70x20Download
45@1960~1995
45@2110~2155
45@2496~2690
872.5433.01.01550@728~757
45@1930~1995
45@2110~2155
45@2496~2690
1962.5623.01.01850@2110~2155
40@2496~2690
50@728~757
50@851~894
2132.5453.01.01850@1930~1995
40@2496~2690
50@728~757
50@851~894
25931943.01.01840@1930~1995
40@2110~2155
50@728~757
50@851~894
SRMP6J926F6J1777RHA9047.42.51.01848@945~95275x82x22Download
48@1727~1732
48@1822~1827
9497.42.51.01848@900~907
48@1727~1732
48@1822~1827
17305.42.51.01848@900~907
48@945~952
48@1822~1827
18255.42.51.01848@900~907
48@945~952
48@1727~1732
SRMP8F8308J1838F4D2017HA830103.01.01450@1710~1735141.6x80x20Download
50@1940~1970
20@2010~2025
1722253.01.01450@825~880
50@1940~1970
20@2010~2025
1955303.01.01450@825~835
50@1710~1735
20@2010~2025
2017154.21.01450@825~835
50@1710~1970
50@1940~1970
SRMP6J925R6J1795FHA902254.32.01550@935~96075x54x22Download
50@1710~1785
50@1805~1880
947254.32.01550@890~915
50@1710~1785
50@1805~1880
1747755.03.01550@890~915
50@935~960
50@1805~1880
1842755.03.01550@890~915
50@935~960
50@1710~1785

It is a component for frequency selecting with both frequency transmitting and receiving updated from design of cavity filter.

In order to produce Cavity Duplexer that lead the market and meet users' needs, our company conducts in-depth communication with thousands of consumers every year to understand consumers' pain points and real needs. In the next step of development, our company will adhere to the road of professional development. We will make the industry bigger and stronger relying on professional scientific research strength, market strength and brand strength. Please contact us now!
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