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poles, one of which is connected to the input of the filter, the other - with the output.

The resonator place between the poles by the holder made from material with

good thermal conductivity. At non-resonance frequencies, the ferrite YIG behaves as
an insulator, and the connection between the input and the output is absent. At the
frequencies close to the resonance there is a strong connection of the input and output
circuits. There is only one communication loop necessary when we use a resonator in
the generator’s construction.

Reconstructive generators and UHF band filters is often makes using YIG-

resonators. YIG generators use as heterodyne, spectrum analyzers, generators of
standard signals, swip-generators. This is due to the ability of the resonators to rebuild
in a wide range and their small phase noise. The filters built with YIG-resonators in
their construction, use as pre-selectors of high-quality microwave receivers, consisting
of broadband frequency multipliers.

The disadvantage of all types of filters based on YIG-resonators is relatively large

inertia of frequency reconfiguration (~ 100 ms), but in the panoramic measuring
apparatus such inertia is acceptable, so this disadvantage is not fundamental.

3. Proposed frequency meter. In fig. 3.1 shown a block diagram of the swip-

generator's frequency meter [5-8].

RG1

RG2

МC

ADD

M, f

LPF

IDU

Output

Figure 3.1. Scheme of the HF generator’s frequency meter

In fig. 3.2 shown the time characteristics of the signals in individual points of the

circuit diagram of the device.

The swip-generator's frequency meter built on the microcontroller (MC). The

microcontroller through the control node (CC) sets the mode of operation of the sweep
generator (SG): the frequency of the output signal, the first and last frequency, the
frequency change band, and other parameters. At the output of the swip-generator, a
measuring signal is generates. This signal is providing to the input of the investigated

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