Band Pass Filter COFDM Spiral filter
BPF Band Pass Filter RF band-pass cavity filter COFDM Spiral filter frequency customized vcan1884
A band-pass filter is a device that allows waves of a specific frequency band to pass while blocking other frequency bands.
A band-pass filter refers to a filter that can pass frequency components in a certain frequency range, but attenuates frequency components in other ranges to a very low level, as opposed to the concept of a band-stop filter.
Okuqukethwe
Izici
Ukucaciswa
Each Helical filter Spiral filter (bandpass filter) is customized according to needs, and the size of different working frequency bands is different.
Into | sepharamitha |
imvamisa | 830-870MHz |
ukufakwa ukulahlekelwa | ≤1.2db |
Buyisela ukulahlekelwa | ≥16db |
Out-of-band kwenqatshwa | ≥60dB @ 760MHz
≥60dB @ 940MHz |
Isixhumi | SMA-K |
isisindo | 0.15kg |
Ubukhulu | 89 * 32 * 20mm |
600-620Mhz BandPass Filter
imvamisa | 600~620MHz |
Insertion Loss | ≤1.2db |
In-Band Fluctuation | ≤0.3db |
VSWR | ≤1.3 |
Out-Of-Band Suppression | ≥40dB@f0±40MHz |
Withstand Power | 20W |
Isixhumi | SMA-K |
Ubukhulu | 89 X 32 X 20mm |
isisindo | 90 amagremu |
806-826Mhz BandPass Filter
imvamisa | 806~ 826MHz |
Insertion Loss | ≤1.2db |
In-Band Fluctuation | ≤0.5db |
VSWR | ≤1.3 |
Out-Of-Band Suppression | ≥40dB@DC~755MHz
≥40dB@875~2000MHz |
Withstand Power | 20W |
Isixhumi | SMA-K |
Ubukhulu | 89 X 32 X 20mm |
isisindo | 90 amagremu |
857~863Mhz BandPass Filter (860Mhz center)
imvamisa | 857~863MHz |
Insertion Loss | ≤1.2db |
In-Band Fluctuation | ≤0.4db |
Standing Wave Ratio | ≤1.3 |
Out-Of-Band Suppression | ≥40dB@FO±20MHz |
Withstand Power | 100-Watt |
Isixhumi | SMA-50K or N-50K optional |
Ubukhulu | 152 x 57 x 30mm |
isisindo | 90 amagremu |
Izinga lokushisa | -35~+65°C |
428-438Mhz 433Mhz BandPass Filter
imvamisa | 428~838MHz (433Mhz+/-5Mhz) |
Insertion Loss | ≤2db |
In-Band Fluctuation | ≤0.5db |
VSWR | ≤1.4 |
Out-Of-Band Suppression | ≥40dB@405MHz
≥40dB@461MHz |
Withstand Power | 20W |
Isixhumi | SMA-50K |
Ubukhulu | 89 X 32 X 20mm |
isisindo | 90 amagremu |
1427.9-1447.9Mhz BandPass Filter
imvamisa | 1427.9~ 1447.9MHz |
Insertion Loss | ≤1.0db |
In-Band Fluctuation | ≤0.5db |
VSWR | ≤1.3 |
Out-Of-Band Suppression | ≥40dB@DC~1360MHz
≥40dB@1570~2000MHz |
Withstand Power | 20W |
Isixhumi | SMA-K |
Ubukhulu | 60 X 50 X 16mm |
isisindo | 70 amagremu |
606-614MHz Cavity filter test record |
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Sample |
Ukulahlekelwa kokufaka ≤1.2db |
VSWR≤1.4 |
In-band fluctuation ≤0.6db |
Out-of-band suppression ≥40db@590MHz |
Out-of-band suppression ≥40db@630MHz |
No.1 | 1.05 | 1.2 | 0.4 | 53 | 56 |
No.2 | 1.01 | 1.2 | 0.4 | 51 | 52 |
428-438MHz Helical Filter Test Record |
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Sample |
Insertion loss ≤1.3db |
Return loss≥15db |
In-band fluctuation ≤0.6db |
Out-of-band rejection ≥40db@383MHz |
Out-of-band suppression ≥40db@483MHz |
No.1 | 1.13 | 19 | 0.4 | 43 | 44 |
No.2 | 1.05 | 20 | 0.4 | 44 | 45 |
Imibuzo Evame Ukubuzwa
For the helical bandpass filter (BPF) to meet the blue line in the picture, the length of the bandpass filter needs to be increased from 89mm to more than 110mm, and the insertion loss may increase by about 1.
- The minimum bandwidth can only be about 3MHz.
- The performance index of 2MHz is very poor and not ideal.
- The volume size is around 199*120*31mm.
- The CNC machining is very complicated and the cost is higher. The price is RMB 1,600 yuan. (USD220)
Tips you should know when you order
What is the frequency range?
What is the insertion loss requirement?
Suppress 820-851 MHz,How many DBs are required
The passband is 866-870Mhz.
Thwebula
BPF Band Pass Filter Specification PDF
Products include: cavity filter_bandpass filter_highpass filter_lowpass filter_bandstop filter_notch filter_LC filter_power divider_multi-frequency combiner_cavity duplexer _Coaxial attenuator_Coaxial load_Directional coupler_3dB bridge_Circulator_Isolator.
其他产品有:Isihlungi se-cavity_bandpass filter_high pass filter_low pass filter_band stop filter_notch filter_LC filter_power splitter_multi-frequency combiner_cavity duplexer_coaxial Attenuator_coaxial load_directional coupler_3dB bridge_circulator_isolator.
Isidlulisi sesithombe esinesivinini esiphezulu esisuselwa ku-COFDM sihlongozwa ukuze kuthathwe izithombe zasemoyeni ze-UAV kanye nokugadwa kwevidiyo okungenantambo., kufaka phakathi: i-baseband coding kanye nemoduli yokushintshashintsha, esisetshenziselwa ukwamukela ukusakazwa kwedatha yesithombe sokufakwayo nokusiguqulela kusignali ye-baseband modulation ene-spectrum ethile; a radio frequency A module for up-converting the baseband modulation signal to a set frequency; wherein, the baseband coding modulation module includes: baseband framing, frame scrambling, BCH coding, LDPC coding, bit interleaving, constellation mapping, constellation rotation, Time interleaving, time frame mapping, frequency interleaving, pilot insertion, IFFT transformation, unogada isikhawu, spectrum shaping; the radio frequency module includes: digital-to-analog converter (DAC), voltage-controlled oscillator (VCO), up-converter (Modulator ), band-pass filter (BPF), power amplification (PA); using the COFDM-based high-speed wireless image transmission transmitter, the video data transmission rate can be significantly improved in high-speed mobile environments such as drone aerial photography, Meet the requirements of high-definition and ultra-high-definition image transmission.
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