Focused on resistive film technologies, Passive Plus Resistor Products offers a comprehensive variety of low and high power surface mounted passive devices for the MRI, wireless infrastructure and defense markets.

Applications for these products include single and mutli-carrier power amplifiers, dividers / combiners, isolators, circulators, and circuits requiring stripline, microstrip and surface mounted flange packages.. These include:-

High Power Chip Resistors and Terminations
High Power Attenuators
High Power Thinfilm R & T's
Lower Power Chip Attenuators
High Power Aluminum Nitride R & T's
High Power Aluminum Nitride Chip R&T's

Thermal Variable Attenuator is an element, the attenuation of which changes  following the change of environmental temperature. If you use this Thermal Variable Attenuator, attenuation decreases as temperature rises, so it can correct characteristics, which lose gain with a temperature rise on the high frequency amplified circuit. With only one Thermal Variable Attenuator, you can directly control input signals with analog continuity and it is the simplest and the most reasonably priced method for adjusting the characteristics influenced by the change of environmental temperature. We can serve not only the improvement of circuit performance but far-reaching merits; cost saving and simplification of material control. We have good results in correcting temperature influences of circuits used in various telecommunication amplifiers for such the base station of cellular phones by using this Thermal Variable Attenuator. 

Features
Fine reproducibility enables attenuation to change to the certain values following the change of ambient   　temperatures.
Analog correcting enables smooth continuous correction by a single step.
Due to its simple design, little phase changes and time delay change by temperature changes
Available in a wide range from low to high frequency by consisting of passive resistor materials
Miniature size(2.0X1.25mm), light(about 6.5mg) and less area in a circuit  
Easy automatic mounting because of the surface-mount type provided (taped to a post)
High reliability by simple design and few junctions
Temperature correction at a more reasonable price than in other styles
Using high precision thin film and a special thermostatic resistor, it makes no attenuation change by effects 　except temperature, and guarantees steady operation. 
Serves a total of 80 temperature correction characteristics. (Each of 10 attenuations has 8 variation slope 　characteristics.) 
 

Specification
Attenuation and Tolerance
 1,2,3,4,5,6,7,8,9,10dB    +/-0.5dB 
Impedance
 50 ohm 
V S W R
 Less than 1.3
Frequency Range
 DC - 3GHz 
Power Rating
 63mW 
Operating Temperature Range
 -40 - +100 ℃
 
Temperature Characteristics  under request