J. A. Ratcliffe
| John Ashworth Ratcliffe | |
|---|---|
| John Ashworth Ratcliffe, FRS © National Portrait Gallery, London | |
| Born | 12 December 1902 Bacup, England | 
| Died | 25 October 1987 (aged 84) Cambridge, England | 
| Alma mater | Sidney Sussex College, Cambridge | 
| Known for | Ionospheric physics | 
| Spouse | Nora Disley | 
| Children | 2 | 
| Awards | See list | 
| Scientific career | |
| Fields | Radio physics | 
| Institutions | University of Cambridge TRE in Dundee Radio Research Station | 
| Academic advisors | Edward Appleton | 
| Doctoral students | Basil Briggs Maurice Wilkes Joseph Lade Pawsey Ronald N. Bracewell Henry G. Booker | 
| Other notable students | Martin Ryle | 
John Ashworth Ratcliffe CB CBE FRS (known to intimates as "Jar"; 12 December 1902 – 25 October 1987) was an influential British radio physicist. (Several sources misspell his name as Radcliffe.)