Description: Order two or more and save. Made by JCA. Gain bandwidth is wider, but my spec is for the more rigorous condition of VSWR matching with S11<-15 dB. This is met at room temperature approximately from 810 MHz to 1,100 MHz and at 77K approximately from 800 MHz to 1,000 MHz. I am not sure of the bandwidth for minimum noise, but it is probably about 810 MHz to 860 MHz. The VNA sweeps are for one representative LNA. Not necessarily the best piece, rather the only one that I swept the day I took the pictures. I have used all of them and they were all made to the same spec. Nevertheless, for this price, you are accepting the possibility of performance variations. Buyer is responsible for reviewing the VNA sweeps and forming their own opinion of the likely S-parameter performance. This LNA was made using hard substrate so that it can also be used at cryogenic temperatures. In fact it performs well from room temperature down to cryogenic, in air and in vacuum. Very low outgassing. Designed for high vacuum operation. Lower operating temperature limit is unknown. I have used these down to 25 Kelvin. I have never taken them above 320 Kelvin (47 Celsius). Manufacturer logo was not imprinted due to the vacuum specification. SMA (f) connectors mounted on a 23 mm x 25 mm x 9 mm housing. 50 Ohm. Bias at +5 VDC and 0.073 A. You can bias as low as 2.5 Volts if you need even lower heat load. These VNA sweeps used a 2.5 V bias which drew only 68 mA. No heat sink needed with this LNA. I have attached a Zener diode across the bias terminals so it is already electric shock resistant. (The Zener leads might be coated with GE varnish for electrical insulation.) Be careful with the polarity. The high voltage pin is on the output side and has the Zener diode attached to it. The ground pin is on the input side. It is all metal and is in electrical contact with the housing. Reversing the bias polarity can destroy the amplifier. Noise Figure at 77K is <0.5 dB. I once measured the noise figure versus temperature for one of them. The attached graph is a representative sample from the large lot that I once owned, and is not guaranteed to be exactly the same as the piece that you receive. Noise figure was measured at 5.0 VDC bias. 1 dB compression point is about +5 dBm to +10 dBm at the output. I measured P1dB=-19 dBm at the input for the unit in the photos. My memory says the IP3 is about +15 dBm to +20 dBm at the output. Again, this is not guaranteed.
Price: 9.99 USD
Location: Everett, Washington
End Time: 2024-02-22T19:56:59.000Z
Shipping Cost: N/A USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Maximum Output Power: +10 dB
Brand: Unbranded
Noise Coefficient: 1 dB Noise Figure
Frequency Range: 800 - 1,100 MHz
Gain: 25 dB
