Major electronic parts contains RF inductance. “ to dog animal, the embedded glass in the skin that in us the home raises a creature is in charge of interior to contain an inductance ” , the Maria Del Mar Villarrubia of an engineer of research and development of company of general Lai silent says, metropolis generation is wireless between two inductance when “ starts a car every time communication, one is in the car is in-house, another is in the key is in-house. ”

 

Nevertheless, no less than of this kind of component omnipresent same, RF inductance also is having very specific use. In syntonic circuit, these component are used with capacitance union normally, so that choose specific frequency (like oscillating circuit, pressure accuse the) such as the oscillator.

 

RF inductance also can be used at impedance to match application, so that realize the impedance of data transmission line,balance. This is to ensure the efficient data between IC transmits place indispensible.

 

When be being used as RF choke, inductance series connection is in circuit, have the effect of RF filter. Simple for, RF choke is low connect filter, it can cause attenuation to taller frequency, and inferior frequency is straightway.
 

 

Method / measure 1:

What is Q value

 

When discussion inductance function, q value is the most important measure index. Q value is a kind of index that measures inductance performance, it is the parameter of key link of a boundless, use at comparing oscillation frequency and energy loss rate.

 

The Deryl J of advanced product manager of Murata company. Kimbro says: &Ldquo;Q cost is higher, the function of inductance receives the nondestructive inductance that is bordering on ideal more. That is to say, it is in in syntonic circuit alternative better. ”

 

Another advantage that tall Q is worth is loss low, that is to say the energy that inductance wastes is little. Low Q value can cause bandwidth wider, and in oscillation frequency place and the syntonic extent near its are inferior.

 

Method / measure 2:

Inductance value

 

Besides Q factor, the true measurement of inductance is its inductance value of course. To frequency and power source application, inductance takes a cost is several Henry normally, and application of high frequency rate needs normally small much inductance, be in normally fine long hair inside henry or limits of small go smoothly.

 

Inductance value depends on a few elements, include material of dimension of structure, core, core and actual coil among them v/LIT all over the ground number. Inductance has inductance value to secure already, also inductance is worth adjustable.