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Home > Electrical & Electronics > Telecommunication & Broadcasting > Satellite > 17.2-22.2GHz LNB Ka Band Dual-Channel Low Noise Block Downconverter LNB

17.2-22.2GHz LNB Ka Band Dual-Channel Low Noise Block Downconverter LNB

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17.2-22.2GHz Ku Band LNB

Negotiable MOQ: 1 Combo (Price negotiable depending on order volume and customization)

Key Specifications

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Type:

Other, VSAT

Application:

Other, VSAT

Usage:

Other, VSAT

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Shenzhen Huashi Digital Technology Co., Ltd.

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Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

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Type Other, VSAT

Application Other, VSAT

Usage Other, VSAT

Wave Range Other, Q Band

Customized Customized

FR1 42.5-45.5GHz

FR2 45.5-51GHz

FR3 51-57GHz

FR4 57-63GHz

FR5 37-42.5GHz

FR6 31-37GHz

Origin China

GKA435445G Q-Band Dual-Channel Low Noise Block Downconverter (LNB)

1. Product Description

GKA435445G is a high-performance Q-Band Dual-Channel Low Noise Block Downconverter (LNB) designed for advanced satellite communication and millimeter-wave measurement systems. It integrates two independent receive channels covering the full 43.5–45.5 GHz spectrum, down-converting them simultaneously to a standard 1.66–2.66 GHz IF output.

Featuring a positive frequency conversion architecture, auto-sensing internal/external reference switching, and an industrial-grade wide-temperature design, this unit offers exceptional sensitivity (Noise Temp ≤ 500K) and high gain (≥ 60 dB). It is housed in a compact, shielded aluminum cavity, making it ideal for both fixed ground stations and portable terminals.

1.1 2. Key Features

Dual Segment Coverage: Simultaneous reception of 43.5–44.5 GHz and 44.5–45.5 GHz.

Positive Spectrum Output: RF frequencies map directly to IF frequencies (1.66–2.66 GHz).

High Gain & Low Noise: ≥ 60 dB conversion gain with a maximum noise temperature of 500 K.

Smart Reference Switching: Automatically detects external 10MHz reference (≥ +5 dBm); falls back to internal OCXO if absent.

Wide Voltage Input: Supports +12 VDC to +18 VDC via the IF coaxial cable (PoE capable).

Superior Stability: Gain flatness ≤ 2.0 dB p-p; operating temperature range -40°C to +75°C.

Standard Interfaces: BJ400 (WR22) waveguide input and N-Type (50Ω) IF output.

1.2 3. Technical Specifications

1.2.1 3.1 Electrical Performance

Parameter	Min	Typ	Max	Unit	Notes
RF Input Frequency	43.5	-	45.5	GHz	Dual Segment
IF Output Frequency	1.66	-	2.66	GHz	Positive Spectrum
Conversion Gain	60	62	-	dB	Full Band
Noise Temperature	-	450	500	K	@ +25°C Ambient
Gain Flatness	-	-	2.0	dB p-p	Full Band
In-Band Ripple	-	-	1.5	dB	Per Segment
Input VSWR	-	-	2.5	-	RF Waveguide Port
Output VSWR	-	-	2.0	-	IF Port (N-Type)
Image Rejection	40	-	-	dBc	-
LO Frequency Stability	±1	±3	±5	ppm	Over Temp (-40~+75°C)

1.2.2 3.2 Reference Clock & Power

Parameter	Specification	Notes
External Reference Freq.	10 MHz	Sine wave required
Ext. Ref. Input Level	≥ +5 dBm	Auto-detect threshold
Reference Switching	Auto	No manual switch required
Supply Voltage	+12 ~ +18 VDC	Via IF Cable
Power Consumption		Typical operation

1.2.3 3.3 Environmental & Mechanical

Parameter	Specification	Notes
Operating Temperature	-40°C ~ +75°C	Industrial Grade
Storage Temperature	-50°C ~ +85°C	-
RF Input Interface	BJ400 (WR22)	Standard Flange
IF Output Interface	N-50K (Female)	SMA optional
Dimensions (LxWxH)	[Insert Dimensions]	e.g., 150 x 80 x 60 mm
Weight	[Insert Weight]	Approx. 500 g www.szwisi.com

1.3 4. Functional Description

1.3.1 4.1 Reference Clock Logic

The GKA435445G features a seamless reference clock management system:

External Priority: Upon power-up, the unit monitors the IF port for a 10MHz signal. If a valid signal (≥ +5 dBm) is detected, the unit locks to the external reference immediately.

Internal Fallback: If no external signal is present, the unit automatically switches to the internal high-stability oven-controlled crystal oscillator (OCXO) to ensure continuous operation.

Real-time Detection: The unit continuously monitors the reference signal during operation.

1.3.2 4.2 Power Supply

The device utilizes a single DC power input through the IF output connector. A regulated +12V to +18V DC source is required.

1.4 5. Application Scenarios

Q-Band VSAT Ground Stations: High-throughput satellite communications.

Radio Astronomy & Remote Sensing: Reception of weak cosmic microwave signals.

Millimeter-Wave Test Systems: Front-end downconversion for spectrum analyzers.

5G/6G Backhaul: Point-to-point high-frequency link receivers.

Portable Terminals: Compact and robust design suitable for field deployment.

1.5 6. Outline Drawing & Interface Definition

(Note: Insert mechanical drawing here)

RF Input Port: BJ400 (WR22) Rectangular Waveguide Flange.