CONTENT 6-2016

M. Savchenko, O. Starovoitova
METHOD FOR REDUCING THE NON-RESOURCE OF A VOLTAGE-CONTROLLED AUTOGENERATOR (pp. 3-8)

I.V. Ryabov, I.V. Strelnikov, S.V. Tolmachev
DIGITAL-TO-ANALOG SYNTHESIZER OF ULTRA-WIDEBAND SIGNALS (pp. 9-15)

I.V. Ryabov, I.V. Strelnikov, D.A. Chernov
DIRECT DIGITAL SYNTHESIZER WITH V-SHAPED FREQUENCY MODULATION LAW (pp. 16-21)

M.D. Vladimirov
CALCULATION OF TRANSITION PROCESSES IN LINEAR SYSTEMS AFTER SEQUENCE OF PULSE SIGNALS BY THE LAPLACE-PADE METHOD (pp. 22-28)

V.N. Kochemasov, A.V. Golubkov, S.I. Dinges, E.R. Khasyanova
HARDWARE-AND-SOFTWARE LABORATORY BENCHES DEVELOPMENT BY WAY OF MODERN SIGNAL GENERATING DEVICES SPECTRAL CHARACTERISTIC INVESTIGATION (pp. 29-33)

Ali harmouch,Hassan Haddad, Mostapha Ziade, Rabih Barake
ON THE MINIATURIZATION OF CYLINDRICAL OMNI-DIRECTIONAL SLOTTED WAVEGUIDE ANTENNAS FOR WIRELESS APPLICATIONS (pp. 34-40)

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ABSTRACTS & REFERENCES

METHOD FOR REDUCING THE NON-RESOURCE OF A VOLTAGE-CONTROLLED AUTOGENERATOR

M. Savchenko, savchenkomp@mail.ru
O. Starovoitova,
I. Kant Baltic Federal University, Kaliningrad, Russia

Abstract

A method is proposed for reducing the non-isochronism of a self-oscillator controlled by varicaps by automatic correction of bias voltage.

References

1. Savchenko M.P., Kuleshov V.N. An experimental study of fluctuations in a transistor oscillator with varicaps. Elektrosvyaz. 1984. No. 2, pp. 55-58.
2. Carlson D. A transistor generator with stabilization of the oscillation amplitude using a diode in the positive feedback circuit. U.S. Pat. 331-109, H03b 3/02, H03b 5/12, No. 3855550 stated 08.24.73, publ. 12/17/74.
3. Kuleshov V.N., Savchenko M.P. Equivalent capacity of VPS varicaps. Radioelectronics. (Izv. Higher education. Institutions). 1988. No. 2, pp. 71-74.
4. Savchenko M.P., Karpinskaya T.A. The equivalent circuit and parameters of VHF varicaps. Radio Engineering. 1985. No. 11.
5. Yakubovsky S.V., Barkanov N.A., Kudryashov B.P. et al. Analog and digital integrated circuits. (Design of electronic equipment on integrated circuits). Moscow: Sov. Radio. 1979. 336 p.

DIGITAL-TO-ANALOG SYNTHESIZER OF ULTRA-WIDEBAND SIGNALS

I.V. Ryabov, ryabov22@mail.ru,
I.V. Strelnikov, S.V. Tolmachev,
Volga State University of Technology, the Republic of Mari El, Russia

Abstract

The article considers the structure and the principle of operation of the digital-to-analog synthesizer of ultrawideband signals, their function and the field of application. The advantages of the application of combined synthesizers over traditional DDS were described.

References

1. Belov L.A. The formation of stable frequencies and signals. Tutorial. Moscow: Publishing House Center “Academy”. 2005.
2. Ryabov I.V. Digital synthesis of precision signals. Monograph. Yoshkar-Ola: MarSTU. 2005.
3. Ryabov I.V. Digital synthesizer with a V-shaped law of frequency modulation. Instruments and experimental technique. No. 3. 3006, pp. 46-49.
4. Ryabov I.V. Digital frequency synthesizer with V-shaped modulation low. Instruments and Experimental Technique. No. 3. 2006, pp. 44-47.
5. Ryabov I.V., Dedoa A.N., Yuryev P.M. RF patent No. 2407144. IPC H03L 7/18. A synthesizer with a V-shaped law of frequency modulation. Decl. 06/22/2009. Publ. 12/20/2010. Bull. Number 35.

DIRECT DIGITAL SYNTHESIZER WITH V-SHAPED FREQUENCY MODULATION LAW

I.V. Ryabov, ryabov22@mail.ru,
I.V. Strelnikov, D.A. Chernov,
Volga State University of Technology, the Republic of Mari El, Russia

Abstract

The article considers the problems of the design of direct digital synthesizers of frequency-modulated signals, the structure and the principle of operation of the synthesizer with V-shaped frequency modulation law. The function and the field of application of this DDS have been revealed.

References

1. Belov L.A. The formation of stable frequencies and signals. Tutorial. Moscow: Publishing House Center “Academy”, 2005.
2. Ryabov I.V. Digital synthesis of precision signals. Monograph. Yoshkar-Ola: MarSTU. 2005.
3. Ryabov I.V. Digital synthesizer with a V-shaped law of frequency modulation. Instruments and experimental technique. No. 3, 3006, pp. 46-49.
4. Ryabov I.V. Digital frequency synthesizer with V-shaped modulation low. Instruments and Experimental Technique. No. 3. 2006, pp. 44-47.
5. Ryabov I.V., Morozova O.E. RF patent No. 2286645. IPC H03L 7/18, H03B 19/00. Digital Computing Synthesizer. Claim 03/25/2005. Publ. 10/27/2006. Bull. No. 30.

CALCULATION OF TRANSITION PROCESSES IN LINEAR SYSTEMS AFTER SEQUENCE OF PULSE SIGNALS BY THE LAPLACE-PADE METHOD

M.D. Vladimirov, vladimirovmd@mail.ru,
National Research University «Moscow Power Engineering Institute», Moscow, Russia

Abstract

We consider one of the promising numerical methods of the inverse Laplace transform — the Laplace – Padé method, as well as its step-by-step modification, which allows one to increase the accuracy of the calculation of transients in linear circuits by breaking the integration interval into several segments and applying decision matching with continuity at the “junction” points function and its derivatives. Previously, this problem was solved when analyzing the impulse and transient characteristics of circuits such as low-pass and high-pass filters, band-pass and notch filters.

References

1. Vlach K., Singhal K. Machine methods of analysis and design of electronic circuits. Moscow: Radio and Communications. 1988.
2. Bogachev V.M., Balashkov M.V., Vladimirov M.D. Analysis of transients in low and high pass filters by the numerical Laplace – Padé method. “SINCHROINFO-2013”. Yaroslavl: LLC “Bris-M”. 2013, pp. 60-62.
3. Bogachev V.M., Balashkov M.V., Solomatin D.A., Vladimirov M.D. The main properties of the inverse Laplace – Padé numerical transformation and its stepwise modification. Bulletin of MPEI. 2015.
4. Baker J., Graves-Morris P. Pade approximations. Moscow: World. 1986.
5. Bogachev V.M., Solomatin D.A. Modification of the Vlach method for the analysis of transients in frequency-selective circuits. Proceedings of the RNTORES A.S. Popov. Issue 57. Vol. 2. Moscow: Radio engineering. 2002, pp. 76-78.

HARDWARE-AND-SOFTWARE LABORATORY BENCHES DEVELOPMENT BY WAY OF MODERN SIGNAL GENERATING DEVICES SPECTRAL CHARACTERISTIC INVESTIGATION

V.N. Kochemasov, A.V. Golubkov, S.I. Dinges, E.R. Khasyanova,
ehasyanova@gmail.com,
Research Center-33, Moscow Technical University of Communications and Informatics, Moscow, Russia

Abstract

Тhe research is focused on the development of hardware-and-software laboratory stands, software due to control them and laboratory operations manual aimed to studies and laboratory-based work undertaking. The aim of the research is to improve the efficiency of learning process of bachelor’s, Master’s degree and PhD students in the field of signal generation. Proposed technical equipment allows generating and analyzing both standard and complex radio signals. It also introduces students to the modern devices of signals forming and analysis. Result of the work is two hardware and software laboratory benches. The first is aimed to the studying of modern direct digital synthesizers (DDS). It based on the development board with 1508PL8T chip. The second is to the research of the spectral characteristics of modulated and unmodulated signals with the use of G4-RC2/150 as signals generator.

References

1. Integrated circuit 1508PL8T. Technical description. http://radiocomp.ru/joom/images/storage/products/eb1508pl8t/1508pl8d.pdf.
2. Universal two-channel generator G4-PK2 / 150. Technical description. http://radiocomp.ru/joom/images/storage/products/generator/instruction.pdf.
3. Signal Hound USB-SA44B. User’s Manual. http://radiocomp.ru/joom/images/storage/products/sa44/SA44B_211a_rus.pdf.
4. Debug board for the 1508PL8T chip. Technical description. http://radiocomp.ru/joom/images/storage/products/eb1508pl8t/1508pl8d.pdf.
5. Measurement of parameters of quartz resonators using a G4-PK2 / 150-AF generator with the option of measuring the frequency response and phase response. http://radiocomp.ru/joom/images/storage/products/generator/article.pdf.

ON THE MINIATURIZATION OF CYLINDRICAL OMNI-DIRECTIONAL SLOTTED WAVEGUIDE ANTENNAS FOR WIRELESS APPLICATIONS

Ali Harmouch,harmush_ah@hotmail.com,
Hassan Haddad, Mostapha Ziade, Rabih Barake,
Lebanese University, Tripoli, Lebanon

Abstract

Antennas are becoming crucial in an increasingly growing number of vital applications, particularly with the emergence of the 3G and 4G generations of communications. Point-to-multipoint configuration is a major interest nowadays; therefore antennas are designed for this purpose where efficiency, size, and cost play a decisive role. The common practice is to refer to the already existing antennas in the market for this sole purpose. Nonetheless, a major drawback of such solutions is that the aforementioned criteria are extremely hard to simultaneously optimize. The purpose of this project is to present a new configuration relying on the use of Slotted Circular Waveguide Antennas, which are initially used in Radar applications, as an ultimate alternative that allows drastically enhancing the ratio of performance versus cost. Moreover, the antenna will be remodeled and designed to function as an enhanced Circular Slotted Waveguide Antenna with optimized directional characteristics with gain above 10 dBi (to be considered as high gain). Simulation results were carried out at 2.4 GHz frequency and indubitably demonstrated high effectiveness in terms of directivity and high gain given a reduced cost, shape and size. A prototype was fabricated to measure its parameters and compare them with simulation results. It is still noteworthy to mention that these results matched with an elevated accuracy since the pattern simulated is meshed and modeled to a far extent taking into account all non-ideal characteristics.

References

1. Takeshima T. X-band omni-directional double-slot array antenna. Electron Eng. Vol. 39, pp. 617-621, Oct 1967.
2. Lyon R.W., Sangster A.J. Efficient moment method analysis of radiating slots in a thick-walled rectangular waveguide. Proc. Inst. Elect. Eng. Part H. Vol. 128, pp. 197-205, Aug. 1981.
3. Sangster A.J., Wang H. Resonance properties of omnidirectional slot doublet in rectangular waveguide. Electronics Letters. Vol. 29, pp. 1618. No. 1. 1993.
4. Mondal P., Chakrabarty A. Slotted Waveguide Antenna with Two Radiation Nulls. IEEE transactions on antennas and propagation. Vol. 56. No.9, September 2008.
5. Harmouch A., Haddad H. Applications on Ring-Shaped Omni-Directional Waveguide Antennas / SSN 566, Summa Notes, Sensor & Simulation Notes/16 June, 2013/ University of New Mexico, USA. 2013
6. Harmouch A., Haddad H. Cylindrical Omnidirectional Slotted Waveguide Antenna with Optimized Directional Characteristics / MMS 2013, 2-5 September 2013, Sayda-Lebanon.