Tagged Questions

3
votes
1answer
55 views

Using low-noise amplifiers

I have a receiver with sensitivity -50 dBm and an input signal from an antenna of -90 dBm, is it prudent to amplify the signal with a cascade of low-noise amplifiers? The LNA I found for my frequency ...
1
vote
0answers
99 views

Extending the range of a Remote Keyless Entry RKE key fob

If it possible to amplify the RF emitted from my key fob to dramatically increase it's range when attempting to remote start my car? My wife is a nurse and leaves the hospital late at night. She'd ...
4
votes
3answers
443 views

How are RF signals amplified?

So this may be a terribly stupid question but since my RF knowledge is fairly limited I'm asking it anyway. Let's say you have an AM signal that's 5Vp-p at some frequency. To amplify this can you ...
0
votes
1answer
301 views

How to Increase RF Amplifier Efficiency?

I've inherited another engineer's RF design and I would like to increase the transmitter efficiency. It's a 406 MHz radio that is using 14W to send out 5W (36%). The amplifier in use is ...
0
votes
3answers
162 views

Lower Voltage RF Amplifier for 400 MHz

I'm using this Mitsubishi RF amplifer in a portable device. The Mitsubishi amp operates well between 7V - 9V. But I have to interface with a power source that gives 1.5V, and stepping 1.5V up to 7V ...
4
votes
2answers
544 views

100W Low Pass Filter

Currently I have a 60W amplifier for the 400-500MHZ band with a 50Ω impedance. In order to prevent jamming other frequencies I will need a low pass filter to block any frequencies above 500MHZ. I just ...