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SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Print: 0040-2508
ISSN Online: 1943-6009

# Telecommunications and Radio Engineering

pages 79-86

## THE COMPARATIVE ANALYSIS OF A MULTIPROBE MICROWAVE MULTIMETERS WITH INVOLVEMENT OF PROCESSING BY THE KALMAN FILTERING AND THE LEAST-SQUARES METHODS WITH REGARD FOR RE-REFLECTION OF PROBES

O.B. Zaichenko
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
I.I. Klyuchnik
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
M. A. Miroshnik
Ukrainian State University of Railway Transport 7, Feierbakh Sq., Kharkiv, 61050, Ukraine
R.I. Tzekhmistro
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine

### ABSTRACT

An error introduced by re-reflection between sensors into the error of a multiprobe microwave multimeter is dealt with. The spacing between the sensors is appropriate to λw/8 (λw is the waveguide wavelength). This is clearly indicative of the fact that the adjacent sensors tend to be interactant. The one- and two-dimensional placement of sensors is discussed. A mathematical model is constructed using directed graphs. A set of linear algebraic equations is obtained their components taking account of re-reflections between sensors. When evaluating the error power and other parameters determined with a multiprobe microwave multimeter the authors made use of averaging by the least-squares (LSM) achieved allow for a subsequent prompt changeover to the computerized measuring process.

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