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Si-Ge
. . . . . 141190, . , ., . . .. , 1 e-mail: maksna49@mail.ru
-- . , 0.5-16 10 ...~5%.

I.
, , , -: , , , . .

II.
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db ( f s (V , 0 , 30 G H z, 10 00 ) )
4 -20 -36 -52 -68 -84 -100 40 45 50 55 60 65 70 75 80 85 0 6 12 18 24 30 2

V, V

0

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time, ns ec

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. 1. () () . Fig. 1.Time (a) and spectral (b) characteristics of a signal of the generator , 22, . [1,2]. .2. ~ 8 U=2, U= 2.4 , .2. U= 2.6 , . 2 U=2.8 , . 2 .

. 2. . Fig. 2. Spectral characteristics showing dynamics of modes of the generator at a voltage increase

III.
ADS Si-Ge BFP 620F. . , , (f/f~2, f~16, f=8). c ...~5%. -

201020thInt.CrimeanConference"Microwave&TelecommunicationTechnology"(CriMiCo'2010).13-17September,Sevastopol,Crimea,Ukraine ©2010:CriMiCo'2010OrganizingCommittee;CrSTC.ISBN:978-966-335-329-6.IEEECatalogNumber:CFP10788

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- , . ( 08-07-00298).

UWB CHAOTIC GENERATOR ON Si-Ge TRANSISTOR
Maksimov N. A. Fryazino Branch of Kotelnikov Institute of Radio Engineering and Electronics of RAS 1, Vvedenskii sq., Fryazino, 141190, Moscow region, Russia e-mail: maksna49@mail.ru
Abstract -- Results of simulation and experimental investigation of UWB chaotic generator are presented. As it is shown, such generator can be built on lumped elements and it can produce stable chaotic oscillations in the band 0.5-16 GHz at 10 dB level with efficiency ~5%.

IV.
[1] . . " ", . " (2006)", 2006, 4-7 , . . C. 154-157. [2] Maximov N. A., "S-band transistor chaotic oscillators on th lumped elements", 2005 15 International Conference "Microwave & Telecommunication Technology" (CriMiCo'2005), Conference Proceedings, In Two volumes, Volume 1, September 12-16, 2005. Sevastopol, Crimea, Ukraine, 2005. 192 p. [3] N. A. Maksimov and A. I. Panas, "Three-point circuit for generating band-limited chaotic oscillators", Proc. Int. Symp. Signals Circuits Systems (SCS'2001), Iasi, Romania, July 10-11, 2001, pp. 65-68. [4] Efremova E. V., Maksimov N. A. and Panas A. I., "Control of Power Spectrum Envelope in Single-Transistor Chaotic Oscillator", Proc. Int. Symp. Signals, Circuits and Systems (SCS-2003), July 10-11, 2003, Iasi, Romania, pp. 17-20. [5] . ., . ., . . " ", , 2004, . 49, 2, . 22-27. [6] Linsay P. S. Period doubling and chaotic behaviour in a driven anharmonic oscillator.// Phys. Rev. Lett. 1981. V. 47. P. 1349-1352.

I. Introduction
Multitude of operation modes of dynamic chaos generators, possibility of optimizing their energy efficiency, makes them attractive for application in various areas, such as communications, noise-signal radiolocation, counter radio measures, medicine, etc.

II. Main Part
Results of investigations of microwave chaotic oscillators with upper spectrum boundary near 8 GHz are given in [1-5]. Generation band can be substantially extended if an additional passive nonlinear element is introduced. As it is known [6], during harmonic excitation of an oscillation circuit, containing nonlinear capacitance of p-n junction, chaotic oscillations appear. In our case, one of p-n junctions (collectorbase) of BFP620F transistor connected with inductor L = 1 nH is used. Output signal characteristics of the generator simulated in ADS and spectral characteristics of output signal of experimental generator sample are presented in Figs.1 and 2.

III. Conclusion
By means of simulation as well as in physical experiment the possibility of UWB chaotic modes in the frequency band (f/fc 2, f 16 GHz, fc = 8 GHz) with efficiency ~5% was confirmed.

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201020thInt.CrimeanConference"Microwave&TelecommunicationTechnology"(CriMiCo'2010).13-17September,Sevastopol,Crimea,Ukraine ©2010:CriMiCo'2010OrganizingCommittee;CrSTC.ISBN:978-966-335-329-6.IEEECatalogNumber:CFP10788