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.
Мундариҷа
Вижагиҳо
Мушаххасоти
Each Helical filter Spiral filter (bandpass filter) is customized according to needs, and the size of different working frequency bands is different.
Банди | параметри |
Фосила | 830-870МГс |
талафоти замима | ≤1.2db |
талафоти Бозгашти | ≥16db |
Аз-аз-банд рад | ≥60dB @ 760MHz
≥60dB @ 940MHz |
пайвасткунаки | Шудани лимити-к |
тарозу | 0.15кг |
Андоза | 89 * 32 * 20мм |
600-620Mhz BandPass Filter
Фосила | 600~ 620 МГс |
Insertion Loss | ≤1.2db |
In-Band Fluctuation | ≤0.3db |
VSWR | ≤1.3 |
Out-Of-Band Suppression | ≥40dB@f0±40MHz |
Withstand Power | 20Дар |
пайвасткунаки | Шудани лимити-к |
Андоза | 89 X 32 X 20mm |
тарозу | 90 грамм |
806-826Mhz BandPass Filter
Фосила | 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 | 20Дар |
пайвасткунаки | Шудани лимити-к |
Андоза | 89 X 32 X 20mm |
тарозу | 90 грамм |
857~863Mhz BandPass Filter (860Mhz center)
Фосила | 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-Ватт |
пайвасткунаки | SMA-50K or N-50K optional |
Андоза | 152 х 57 x 30mm |
тарозу | 90 грамм |
ҳарорат | -35~+65°C |
428-438Mhz 433Mhz BandPass Filter
Фосила | 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 | 20Дар |
пайвасткунаки | Шудани лимити-50K |
Андоза | 89 X 32 X 20mm |
тарозу | 90 грамм |
1427.9-1447.9Mhz BandPass Filter
Фосила | 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 | 20Дар |
пайвасткунаки | Шудани лимити-к |
Андоза | 60 X 50 X 16mm |
тарозу | 70 грамм |
606-614MHz Cavity filter test record |
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Намуна |
Талафоти воридкунӣ ≤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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Намуна |
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 |
Саволҳо
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 МГс,How many DBs are required
The passband is 866-870Mhz.
Download
BPF Band Pass Filter Specification PDF
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A COFDM-based high-speed wireless image transmission transmitter is proposed for UAV aerial photography and wireless video surveillance, аз чумла: a baseband coding and modulation module, which is used to receive the input image data stream and convert it into a baseband modulation signal with a specific spectrum; 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, фосилаи посбон, spectrum shaping; the radio frequency module includes: digital-to-analog converter (DAC), voltage-controlled oscillator (VCO), up-converter (Modulator ), филтри гузариш (BPF), power amplification (ТҶ); 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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