Смуговий фільтр BPF Радіочастотний смуговий фільтр Cavity Cofdm Спіральний фільтр частоти індивідуальний vcan1884

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.

риси

специфікація

Each Helical filter Spiral filter (bandpass filter) is customized according to needs, and the size of different working frequency bands is different.

Пункт	Параметр
частота	830-870Mhz
Insertion loss	≤1.2db
Return loss	≥16db
Out-of-band rejection	≥60dB@760MHz ≥60dB@940MHz
Роз'єм	СМА-К
вага	0.15кг
розміри	89 * 32 * 20мм

 

600-620Mhz BandPass Filter

частота	600~620 МГц
Втрата вставки	≤1.2db
In-Band Fluctuation	≤0.3db
КСВ	≤1.3
Out-Of-Band Suppression	≥40dB@f0±40MHz
Withstand Power	20W
Роз'єм	СМА-К
розміри	89 X 32 X 20mm
вага	90 грамів

806-826Mhz BandPass Filter

частота	806~826 МГц
Втрата вставки	≤1.2db
In-Band Fluctuation	≤0.5db
КСВ	≤1.3
Out-Of-Band Suppression	≥40dB@DC~755MHz ≥40dB@875~2000MHz
Withstand Power	20W
Роз'єм	СМА-К
розміри	89 X 32 X 20mm
вага	90 грамів

857~863Mhz BandPass Filter (860Mhz center)

частота	857~863MHz
Втрата вставки	≤1.2db
In-Band Fluctuation	≤0.4db
Standing Wave Ratio	≤1.3
Out-Of-Band Suppression	≥40dB@FO±20MHz
Withstand Power	100-Ватт
Роз'єм	SMA-50K or N-50K optional
розміри	152 х 57 x 30mm
вага	90 грамів
температура	-35~+65°C

428-438Mhz 433Mhz BandPass Filter

частота	428~838MHz (433Mhz+/-5Mhz)
Втрата вставки	≤2db
In-Band Fluctuation	≤0.5db
КСВ	≤1.4
Out-Of-Band Suppression	≥40dB@405MHz ≥40dB@461MHz
Withstand Power	20W
Роз'єм	SMA-50K
розміри	89 X 32 X 20mm
вага	90 грамів

1427.9-1447.9Mhz BandPass Filter

частота	1427.9~1447,9 МГц
Втрата вставки	≤1.0db
In-Band Fluctuation	≤0.5db
КСВ	≤1.3
Out-Of-Band Suppression	≥40dB@DC~1360MHz ≥40dB@1570~2000MHz
Withstand Power	20W
Роз'єм	СМА-К
розміри	60 X 50 X 16mm
вага	70 грамів

	606-614MHz Cavity filter test record
Sample	Внесені втрати ≤1,2 дБ	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
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

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.

 

Завантажити

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, в тому числі: 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, захисний інтервал, spectrum shaping; the radio frequency module includes: digital-to-analog converter (DAC), voltage-controlled oscillator (VCO), up-converter (Modulator ), смуговий фільтр (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.