Filtre passe-bande BPF, filtre à cavité RF, filtre en spirale Cofdm, fréquence personnalisée 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.

Caractéristiques

spécification

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

Article	Paramètre
La fréquence	830-870mhz
Insertion loss	≤1.2db
Return loss	≥16db
Out-of-band rejection	≥60dB@760MHz ≥60dB@940MHz
Connecteur	SMA-K
Poids	0.15kilos
Dimensions	89 * 32 * 20mm

 

600-620Mhz BandPass Filter

La fréquence	600~620MHz
Perte d'insertion	≤1.2db
In-Band Fluctuation	≤0.3db
VSWR	≤1.3
Out-Of-Band Suppression	≥40dB@f0±40MHz
Withstand Power	20W
Connecteur	SMA-K
Dimensions	89 X 32 X 20mm
Poids	90 grammes

806-826Mhz BandPass Filter

La fréquence	806~826MHz
Perte d'insertion	≤1.2db
In-Band Fluctuation	≤0.5db
VSWR	≤1.3
Out-Of-Band Suppression	≥40dB@DC~755MHz ≥40dB@875~2000MHz
Withstand Power	20W
Connecteur	SMA-K
Dimensions	89 X 32 X 20mm
Poids	90 grammes

857~863Mhz BandPass Filter (860Mhz center)

La fréquence	857~863MHz
Perte d'insertion	≤1.2db
In-Band Fluctuation	≤0.4db
Rapport d'onde stationnaire	≤1.3
Out-Of-Band Suppression	≥40dB@FO±20MHz
Withstand Power	100-Watt
Connecteur	SMA-50K or N-50K optional
Dimensions	152 X 57 x 30mm
Poids	90 grammes
Température	-35~+65°C

428-438Mhz 433Mhz BandPass Filter

La fréquence	428~838MHz (433Mhz+/-5Mhz)
Perte d'insertion	≤2db
In-Band Fluctuation	≤0.5db
VSWR	≤1.4
Out-Of-Band Suppression	≥40dB@405MHz ≥40dB@461MHz
Withstand Power	20W
Connecteur	SMA-50K
Dimensions	89 X 32 X 20mm
Poids	90 grammes

1427.9-1447.9Mhz BandPass Filter

La fréquence	1427.9~1447,9MHz
Perte d'insertion	≤1.0db
In-Band Fluctuation	≤0.5db
VSWR	≤1.3
Out-Of-Band Suppression	≥40dB@DC~1360MHz ≥40dB@1570~2000MHz
Withstand Power	20W
Connecteur	SMA-K
Dimensions	60 X 50 X 16mm
Poids	70 grammes

	606-614MHz Cavity filter test record
Échantillon	Insertion loss ≤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
Échantillon	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.

 

Télécharger

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, comprenant: 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, intervalle de garde, spectrum shaping; the radio frequency module includes: digital-to-analog converter (DAC), voltage-controlled oscillator (VCO), up-converter (Modulator ), filtre passe-bande (FBP), power amplification (Pennsylvanie); 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.