Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 5, Issue 2, 23 January 1969
Volumes & issues:
-
Volume 59 (2023)
-
Volume 58 (2022)
-
Volume 57 (2021)
-
Volume 56 (2020)
-
Volume 55 (2019)
-
Volume 54 (2018)
-
Volume 53 (2017)
-
Volume 52 (2016)
-
Volume 51 (2015)
-
Volume 50 (2014)
-
Volume 49 (2013)
-
Volume 48 (2012)
-
Volume 47 (2011)
-
Volume 46 (2010)
-
Volume 45 (2009)
-
Volume 44 (2008)
-
Volume 43 (2007)
-
Volume 42 (2006)
-
Volume 41 (2005)
-
Volume 40 (2004)
-
Volume 39 (2003)
-
Volume 38 (2002)
-
Volume 37 (2001)
-
Volume 36 (2000)
-
Volume 35 (1999)
-
Volume 34 (1998)
-
Volume 33 (1997)
-
Volume 32 (1996)
-
Volume 31 (1995)
-
Volume 30 (1994)
-
Volume 29 (1993)
-
Volume 28 (1992)
-
Volume 27 (1991)
-
Volume 26 (1990)
-
Volume 25 (1989)
-
Volume 24 (1988)
-
Volume 23 (1987)
-
Volume 22 (1986)
-
Volume 21 (1985)
-
Volume 20 (1984)
-
Volume 19 (1983)
-
Volume 18 (1982)
-
Volume 17 (1981)
-
Volume 16 (1980)
-
Volume 15 (1979)
-
Volume 14 (1978)
-
Volume 13 (1977)
-
Volume 12 (1976)
-
Volume 11 (1975)
-
Volume 10 (1974)
-
Volume 9 (1973)
-
Volume 8 (1972)
-
Volume 7 (1971)
-
Volume 6 (1970)
-
Volume 5 (1969)
-
Volume 4 (1968)
-
Volume 3 (1967)
-
Volume 2 (1966)
-
Volume 1 (1965)
Volume 5, Issue 2
23 January 1969
Square-spiral scanning system
- Author(s): E.M. Deeley and C.M. Jefferson
- Source: Electronics Letters, Volume 5, Issue 2, p. 19 –20
- DOI: 10.1049/el:19690013
- Type: Article
- + Show details - Hide details
-
p.
19
–20
(2)
When spatial frequencies in an image are to be related to the signal derived from scanning, a conventional rectangular raster is not ideal, and some form of spiral scan is to be preferred. The principles involved in generating a square-spiral scanning pattern, which scans at a constant rate, are described.
Microwave incremental conductivity of InSb at 77°K in the presence of high steady electric field
- Author(s): D. Mukhopadhyay and B.R. Nag
- Source: Electronics Letters, Volume 5, Issue 2, p. 20 –21
- DOI: 10.1049/el:19690014
- Type: Article
- + Show details - Hide details
-
p.
20
–21
(2)
Complex microwave incremental conductivity of InSb at 77°K in the presence of a high steady electric field has been calculated assuming a displaced Maxwellian distribution function. The calculated values of the real and imaginary parts of the conductivity are found to be in close agreement with the experimental results for both the parallel and perpendicular orientation of the microwave field.
Dynamics of pulsed-microwave breakdown in a nonuniform field
- Author(s): M.H. Mentzoni and J. Donohoe
- Source: Electronics Letters, Volume 5, Issue 2, p. 21 –23
- DOI: 10.1049/el:19690015
- Type: Article
- + Show details - Hide details
-
p.
21
–23
(3)
A waveguide-fed mica aperture was the site of breakdown. The development of breakdown was followed both in time and space. It was found that the initial stages of breakdown proceeded as expected; the final luminosity distribution, however, seems to suggest that the initial plasma configuration results in a drastic change in the Efield distribution across the aperture.
Computer method of solving waveguide-iris problems
- Author(s): P.H. Masterman ; P.J.B. Clarricoats ; C.D. Hannaford
- Source: Electronics Letters, Volume 5, Issue 2, p. 23 –25
- DOI: 10.1049/el:19690016
- Type: Article
- + Show details - Hide details
-
p.
23
–25
(3)
A computational method of analysing an infinitely thin iris in a waveguide is described. Certain difficulties arise in the truncation of infinite series used in field representation, and these are illustrated with computed results. When these difficulties are overcome, good agreement with results derived by conventional techniques can be obtained.
Measurement techniques in microstrip
- Author(s): P. Troughton
- Source: Electronics Letters, Volume 5, Issue 2, p. 25 –26
- DOI: 10.1049/el:19690017
- Type: Article
- + Show details - Hide details
-
p.
25
–26
(2)
A novel technique has been developed for measurement of dispersion and wavelength in microstrip transmission line laid down on an Al2O3 substrate. The frequency range so far investigated has been 4–12GHz, although the method could be satisfactorily used at far higher frequencies. The measurement accuracy is better than within 1%. Techniques for producing well matched transitions to any thickness substrate have also been established.
Microwave holograms and microwave reconstruction
- Author(s): K. Iizuka
- Source: Electronics Letters, Volume 5, Issue 2, p. 26 –28
- DOI: 10.1049/el:19690018
- Type: Article
- + Show details - Hide details
-
p.
26
–28
(3)
Microwave holographic reconstruction of the metal objects inside a purse was achieved by a nonscanning method. A microwave field was used for both constructing and reconstructing the holographic image. The visualisation of the microwave field was performed by both Polaroid and liquid-crystal techniques. The frequency used was 34.26GHz.
Generation of multiple pseudorandom point processes from msequences
- Author(s): J.M. Taylor
- Source: Electronics Letters, Volume 5, Issue 2, p. 28 –29
- DOI: 10.1049/el:19690019
- Type: Article
- + Show details - Hide details
-
p.
28
–29
(2)
This letter describes a compact source of multiple streams of pseudorandom events, with independently variable mean rates and small mutual crosscorrelations, based on two very long binary msequences. The interevent distributions are shown to be accurately geometric, and negative binomial processes generated from them are also satisfactory.
Stabilisation of transferred-electron amplifiers with large n0L products
- Author(s): S.Y. Narayan and F. Sterzer
- Source: Electronics Letters, Volume 5, Issue 2, p. 30 –31
- DOI: 10.1049/el:19690020
- Type: Article
- + Show details - Hide details
-
p.
30
–31
(2)
The small-signal stability of a transferred-electron device (t.e.d.) driven with a voltage generator of finite impedance is discussed. It is shown that the series impedance significantly alters the stability condition. Computations for a resistor in series with the t.e.d. show that the maximum n0L product for stable operation increases with increasing series resistance. The practical implications of this result are discussed.
Critical conductivity-length product for electromagnetic instability in negative-differential-conductivity media
- Author(s): B.R. Chawla and D.J. Coleman
- Source: Electronics Letters, Volume 5, Issue 2, p. 31 –32
- DOI: 10.1049/el:19690021
- Type: Article
- + Show details - Hide details
-
p.
31
–32
(2)
For a slab of uniform negative-differential-conductivity medium, such as nGaAs, it is shown that unstable plane electromagnetic waves may exist when the thickness exceeds a critical value determined by the product of differential conductivity and length. When the slab is terminated on both sides by vacuum, the critical |σ|L is found to be 2/377S. This instability explains the error in a paradoxical result recently published, namely that a thick slab of negative-conductance material should attenuate rather than amplify incident waves.
Computation of eigenvalues for higher-order modes in a conical horn
- Author(s): P. Bhartia ; W.M. Boerner ; M.A.K. Hamid
- Source: Electronics Letters, Volume 5, Issue 2, page: 33 –33
- DOI: 10.1049/el:19690022
- Type: Article
- + Show details - Hide details
-
p.
33
(1)
A special expansion for the associated Legendre functions and their derivatives is employed to compute the integer eigenvalues for higher-order modes in a conical horn. The resulting plot of these eigenvalues, as a function of horn flare angle, is used to provide graphically the noninteger values corresponding to other flare angles of the horn.
Input impedance of a short antenna in a warm plasma driven from a coaxial air line
- Author(s): D.T. Nguyen
- Source: Electronics Letters, Volume 5, Issue 2, p. 33 –35
- DOI: 10.1049/el:19690023
- Type: Article
- + Show details - Hide details
-
p.
33
–35
(3)
An approximation technique is used to calculate numerically the input impedance of a short antenna immersed in a warm plasma driven from a coaxial air line. The effect of the gap configuration is observed to be significant on the antenna reactance only.
Parameter estimation using pseudorandom binary sequences
- Author(s): C.J. Macleod
- Source: Electronics Letters, Volume 5, Issue 2, p. 35 –36
- DOI: 10.1049/el:19690024
- Type: Article
- + Show details - Hide details
-
p.
35
–36
(2)
The instrumental-variable technique for parameter estimation is applied when the input is a pseudorandom binary sequence (p.r.b.s.). The instrumental variables proposed are time-weighted elements of a p.r.b.s., and this is shown to be equivalent to obtaining the mean value of several estimates obtained from noisy measurements. The estimates of the parameters are asymptotically unbiased.
Self-pumped Gunn-effect parametric amplifier
- Author(s): C.S. Aitchison ; C.D. Corbey ; B.H. Newton
- Source: Electronics Letters, Volume 5, Issue 2, p. 36 –37
- DOI: 10.1049/el:19690025
- Type: Article
- + Show details - Hide details
-
p.
36
–37
(2)
The letter reports the operation of a degenerate parametric amplifier which utilises the self-pumping action of the oscillating domain capacitance in the Gunn effect. Gains greater than 20dB at 5.98GHz have been obtained with the Gunn sample oscillating at 11.96GHz. Amplification is also reported in the normal negative-resistance mode, and an experiment is described which is designed to distinguish between the two modes of amplification.
Most viewed content for this Journal
Article
content/journals/el
Journal
5
Most cited content for this Journal
-
Extreme multistability in a memristive circuit
- Author(s): Bo-Cheng Bao ; Quan Xu ; Han Bao ; Mo Chen
- Type: Article
-
Absorptive frequency selective surface using parallel LC resonance
- Author(s): Qiang Chen ; Liguo Liu ; Liang Chen ; Jiajun Bai ; Yunqi Fu
- Type: Article
-
Partial spectral search-based DOA estimation method for co-prime linear arrays
- Author(s): Fenggang Sun ; Peng Lan ; Bin Gao
- Type: Article
-
Experimental verification of on-chip CMOS fractional-order capacitor emulators
- Author(s): G. Tsirimokou ; C. Psychalinos ; A.S. Elwakil ; K.N. Salama
- Type: Article
-
54 Gbit/s OOK transmission using single-mode VCSEL up to 2.2 km MMF
- Author(s): G. Stepniak ; A. Lewandowski ; J.R. Kropp ; N.N. Ledentsov ; V.A. Shchukin ; N. Ledentsov Jr. ; G. Schaefer ; M. Agustin ; J.P. Turkiewicz
- Type: Article
