Harold Kinley

A look at the PIN diode antenna switch
It handles large power levels with minimum distortion, good isolation and low insertion loss.
Easier said than done
Trade-offs abound when designing amplifiers, even simple ones.
Good to know
The relationship between field intensity and signal level should be understood by all RF technicians.
Maximum power transfer
The maximum transfer of power from a source to its load requires that the load impedance be matched to the source impedance. This applies to both DC and
The universal headache
The amount of noise generated within a receiver system is one of the factors that sets the limits on such systems. Of particular importance is the noise
Using cavity filters to mitigate RF interference
Last month, we discussed various types of RF-resonant cavities. This month the discussion focuses on the actual use of these cavities to mitigate RF interference.
Practical notes about cavity filters 
Quarter-wave resonant cavity filters are used in many RF applications. For instance, they are used in duplexers for repeaters, in transmitter combiners
Using directional couplers 
Understanding how they work is the key to getting the most out of them
A losing proposition 1
How RF attenuation on the transmission line affects the transmitter
Every toolbox needs one of these
The RF sampler is an important test accessory for any field technician
The next level of intermodulation
Here's what to do when dealing with amplifier signals that are unequal
The value of ferrite RF isolators
Proper use at crowded communications sites can reduce intermodulation effects
Deciphering RF units of measure
It is imperative that wireless communication technicians understand the various units of measurement used to quantify the level or amplitude of a radio
Understanding standing wave ratios
The term standing wave ratio, or SWR sometimes called voltage standing wave ratio, or VSWR frequently is a subject of discussions/arguments among communication
Demystifying RF attenuators 1
Creating a high-precision pad can be tricky--here's how to do it

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