Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 9, Issue 22, 1 November 1973
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 9, Issue 22
1 November 1973
Fast synchronisation of an Earth station to a switching satellite
- Author(s): C.R. Carter and S.S. Haykin
- Source: Electronics Letters, Volume 9, Issue 22, p. 513 –514
- DOI: 10.1049/el:19730377
- Type: Article
- + Show details - Hide details
-
p.
513
–514
(2)
A coarse-search-synchronisation technique is described for switched time-division multiple-access systems that uses a coded search signal. It is shown that this method achieves coarse search synchronisation much faster than the burst-synchronisation method described by Rapuano and Shimasaki.
Cheby̅shev quarter-wave stepped balun transformer
- Author(s): B.G. Evans
- Source: Electronics Letters, Volume 9, Issue 22, p. 514 –516
- DOI: 10.1049/el:19730378
- Type: Article
- + Show details - Hide details
-
p.
514
–516
(3)
The design of a balun transformer from coaxial to open-wire line is presented, in which conventional quarter-wave-matching theory is used to produce a compact device with optimal Cheby̅shev performance over its passband. Included in the design are the evaluation and corrections for the junction capacitances caused by stepping the outer coaxial conductor.
Crosspolarisation isolation and discrimination
- Author(s): P.A. Watson and M. Arbabi
- Source: Electronics Letters, Volume 9, Issue 22, p. 516 –517
- DOI: 10.1049/el:19730379
- Type: Article
- + Show details - Hide details
-
p.
516
–517
(2)
Concepts of isolation and discrimination are discussed in connection with frequency reuse on orthogonal polarisations. Using a simplified raindrop model, definitions that arise from these concepts are shown to be identical for propagation through raindrops with an axis of rotational symmetry. Measurements on an 11 GHz radio link confirm these predictions.
Antenna with multibeam applications
- Author(s): B. Claydon
- Source: Electronics Letters, Volume 9, Issue 22, p. 517 –518
- DOI: 10.1049/el:19730380
- Type: Article
- + Show details - Hide details
-
p.
517
–518
(2)
The design of a dual-reflector antenna that focuses an inclined incident plane wave to a point away from the axis of symmetry of the reflector is discussed. A useful application of such a system would be as a multibeam antenna for use in communication via satellites. Curves of path-length errors are presented for the feed positioned on the axis of symmetry, and the effects of refocusing are shown.
Pulsed silicon double-drift IMPATTs for microwave and millimetre-wave applications
- Author(s): G. Pfund ; A. Podell ; U. Tarakci
- Source: Electronics Letters, Volume 9, Issue 22, p. 518 –520
- DOI: 10.1049/el:19730381
- Type: Article
- + Show details - Hide details
-
p.
518
–520
(3)
The letter describes silicon double-drift IMPATT diodes designed for operation at microwave and millimetre-wave frequencies. These devices have delivered pulsed-power outputs of 16 W with 12.3% efficiency in the X band, 11 W with 14% efficiency in the KU band, and 6.4 W with 5.3% efficiency in the Ka band. These results, when combined with the demonstrated high reliability of silicon IMPATTS, should lead to the wide application of double-drift devices in pulsed-radar systems.
Direct analysis of folded dipole by method of moments
- Author(s): M.C. Elias and C.T. Carson
- Source: Electronics Letters, Volume 9, Issue 22, p. 520 –521
- DOI: 10.1049/el:19730382
- Type: Article
- + Show details - Hide details
-
p.
520
–521
(2)
The integral equation for the current on a folded dipole is reduced to a matrix equation by the Galerkin method. The resulting current distribution allows the input impedance ‘step-up’ to be deduced, and also the variation in input admittance with frequency to be examined.
Cost and radix
- Author(s): A.J. Spencer
- Source: Electronics Letters, Volume 9, Issue 22, p. 521 –522
- DOI: 10.1049/el:19730383
- Type: Article
- + Show details - Hide details
-
p.
521
–522
(2)
The letter reviews the arguments usually put forward for binary systems and suggests reasons for using higher radices.
Procedure for the generation of equiripple functions
- Author(s): P. Karivaratharajan and V.G.K. Murti
- Source: Electronics Letters, Volume 9, Issue 22, p. 522 –523
- DOI: 10.1049/el:19730384
- Type: Article
- + Show details - Hide details
-
p.
522
–523
(2)
Equiripple polynomials and rational functions find extensive use in the design of filters. An nth-order equiripple polynomial is obtained by the expansion of the function cos (n cos−1 ω). Equiripple rational functions with specified poles can be obtained using either the method of Darlington or that of Sharpe. In the letter, a different procedure is given that can be used to generate either equiripple polynomials or rational functions with specified poles and equiripple magnitude.
Temperature effects in reflective surface-acoustic-wave delay lines
- Author(s): P.C. Meyer and M.B. Schulz
- Source: Electronics Letters, Volume 9, Issue 22, p. 523 –525
- DOI: 10.1049/el:19730385
- Type: Article
- + Show details - Hide details
-
p.
523
–525
(3)
In addition to variation of delay time with temperature change, reflective surface-acoustic-wave delay lines may suffer signal-amplitude variation with temperature change. This problem occurs because of the anisotropy of the surface-wave velocity and the thermal expansion in the piezoelectric materials used for these devices. Experimental results are presented as well as appropriate design considerations for devices that must be operated at an elevated temperature.
Evalaution of the matrix exponential
- Author(s): A. Wragg and C. Davies
- Source: Electronics Letters, Volume 9, Issue 22, p. 525 –526
- DOI: 10.1049/el:19730386
- Type: Article
- + Show details - Hide details
-
p.
525
–526
(2)
A method is described, using Padé approximants and an integer normalisation factor, for evaluating the matrix exponential. Numerical results are given to demonstrate the efficiency of the method.
Nonlinear power amplification at the second harmonic in TRAPATT diodes
- Author(s): B. Rama Rao
- Source: Electronics Letters, Volume 9, Issue 22, p. 526 –527
- DOI: 10.1049/el:19730387
- Type: Article
- + Show details - Hide details
-
p.
526
–527
(2)
The letter describes a microstrip-amplifier circuit where both the triggering of the trapped-plasma state and amplification occur at the second harmonic of the fundamental TRAPATT frequency. Peak power output of 24 W and a gain of 6.5 dB have been observed with this amplifier at a frequency of 2.29 GHz.
Realisation of the mean-value function
- Author(s): E. Ball
- Source: Electronics Letters, Volume 9, Issue 22, p. 528 –529
- DOI: 10.1049/el:19730388
- Type: Article
- + Show details - Hide details
-
p.
528
–529
(2)
The letter discusses the errors involved in a particular approximation to the mean-value function. The nature of the approximation is discussed, and the results of a computer analysis of the method are given.
Microwave Hall-mobility measurements on 1-dimensional conducting systems [K2Pt(CN)4Br0.3. × H2O and quinolinium (TCNQ)2]
- Author(s): M.M. Sayed ; C.R. Westgate ; J.H. Perlstein
- Source: Electronics Letters, Volume 9, Issue 22, page: 529 –529
- DOI: 10.1049/el:19730389
- Type: Article
- + Show details - Hide details
-
p.
529
(1)
The Hall mobilities of two examples of 1-dimensional conducting systems are reported; for the first time, a microwave technique has been used. The microwave technique was the only appropriate method for these very small crystals.
Calculation of the radiation pattern and impedance of a log-periodic dipole array
- Author(s): E.W. Munro and P.A. Mcinnes
- Source: Electronics Letters, Volume 9, Issue 22, p. 530 –531
- DOI: 10.1049/el:19730390
- Type: Article
- + Show details - Hide details
-
p.
530
–531
(2)
A computer program is presented for the calculation of the radiation and impedance performance of a 12-element log-periodic dipole array. The analysis uses King's 3-term approximation to the current distribution on the elements, taking their mutual interaction into full account.
Second-order digital filter with only one magnitude-truncation quantiser and having practically no limit cycles
- Author(s): T.A.C.M. Claasen ; W.F.G. Mecklenbräuker ; J.B.H. Peek
- Source: Electronics Letters, Volume 9, Issue 22, p. 531 –532
- DOI: 10.1049/el:19730391
- Type: Article
- + Show details - Hide details
-
p.
531
–532
(2)
A 2nd-order digital filter with only one magnitude-truncation quantiser is discussed, and results are given that indicate that limit cycles are almost absent in this filter.
Large-signal direct modulation of injection lasers
- Author(s): W. Harth
- Source: Electronics Letters, Volume 9, Issue 22, p. 532 –533
- DOI: 10.1049/el:19730392
- Type: Article
- + Show details - Hide details
-
p.
532
–533
(2)
Large-signal direct modulation of injection lasers is described with the aid of nonlinear rate equations. For periodic modulation of arbitrary amplitude, an approximate large-signal oscillatory solution is described. Large spiking amplitudes of the modulated photon density are generated near the resonance frequency of the system.
Infrared television: performance of pyroelectric vidicon at 8 to 14 μm
- Author(s): R. Watton ; G. Smith ; B. Harper ; W.M. Wreathall
- Source: Electronics Letters, Volume 9, Issue 22, p. 534 –535
- DOI: 10.1049/el:19730393
- Type: Article
- + Show details - Hide details
-
p.
534
–535
(2)
The performance of a television camera using the 2.54cm pyroelectric vidicon has been measured and compared with an analysis that attempts to identify the factors limiting the performance of the system.
Observation of the small-scale structure of intense rain by the scattering of microwaves
- Author(s): M.E. Cleverley
- Source: Electronics Letters, Volume 9, Issue 22, p. 535 –536
- DOI: 10.1049/el:19730394
- Type: Article
- + Show details - Hide details
-
p.
535
–536
(2)
A bistatic scattering technique has been used to measure the small-scale variations in the reflectivity of rain at a height of about 13 m. The reflectivity has been observed to change by a factor of 24 over a horizontal distance of 8 m.
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
