Mr. Hubert Stadnik Profile

Hubert Stadnik

at Wojskowa Akademia Techniczna

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 11 February 2020 Open Access

Microwave frequency detector using a 4x4 Butler matrix

H. Stadnik, B. Stec

Proceedings Volume 11442, 114421H (2020) https://doi.org/10.1117/12.2565293

KEYWORDS: Microwave radiation, Sensors, Interferometers, Signal detection, Transmittance, Phase shifts, Directional couplers, Interferometry, Signal generators, MATLAB

Read Abstract +

The paper presents an analysis of a microwave interferometer with a multi-ports architecture with one input and four outputs. The tested system consisted of two main parts: a subsystem consisting of a power divider and two transmission lines of different electric length - responsible for developing two signals whose phase difference will depend on the frequency of the input signal. The second part of the tested system consisted of a six-port element - a 4 x 4 Butler matrix, whose task was to develop four signals. The output amplitude depends on the phase difference of the signals fed to the inputs of this six-ports. Frequency detector tests were carried out by calculations in the MATLAB computer program in a very wide band f_g/f_d=4. The system response was analyzed for different combinations pair of an input ports of a six-port system and for different values of coupler coupling coefficients. During the analysis it was shown that the parameters of such an interferometer depend on which ports pair is excited as well as on the value of the coupling factor of the couplers. It is important to specify the system parameters in order to make the optimal selection of the interferometer system configuration in terms of the acceptable frequency detection error, operating bandwidth, or even the topological distribution of the ports.

DOWNLOAD PAPER

Proceedings Article | 11 February 2020 Open Access

Integrated microwave frequency discriminator with rat-race 3dB hybrids

Adam Rutkowski, Hubert Stadnik

Proceedings Volume 11442, 1144209 (2020) https://doi.org/10.1117/12.2565284

KEYWORDS: Microwave radiation, Directional couplers, Sensors, Receivers, Phase shifts, Visualization, Microwave remote sensing

Read Abstract +

The microwave frequency discriminators (MFD) are important part of instantaneous frequency measurement (IFM) receivers. There are known, so-called, single function discriminators (SFMFD) and quadrature discriminators (QMFD). The QMFDs have a more complicated structure but enable achieve, in comparable conditions, a higher frequency measurement resolution. Directional couplers, among other elements, are used for MFD construction. The couplers based on coupled lines provide wide operation frequency band but their fabrication requires more complicated technology. The new structure of quadrature microwave frequency discriminator based on two single-step power dividers and two rat-race 3 dB couplers is proposed in the paper. The correlator of the QMFD was designed and fabricated onto single printed circuit board (PCB). The input port connector and connectors for output microwave detectors were mounted in such way to avoid crossings of the transmission lines on PCB. The middle part of the made discriminator’s operation frequency range includes WiFi frequency band. Structure and measured parameters of the developed and fabricated quadrature microwave frequency discriminator were presented in the paper.

DOWNLOAD PAPER

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years