Malherbe, J.A.G., 1940-2011-08-242011-08-242011-05Malherbe, JAG 2011, 'Wideband bandstop filter with sub-harmonic stubs', Electronics Letters, vol. 47, no. 10, pp.604-605.1577-5097 (print)1577-5097 (online)10.1049/el.2011.0604http://hdl.handle.net/2263/17158The performance of a wideband bandstop transmission line filter employing a series overlay inductor over two stubs resonating at respectively one half and one quarter of the centre frequency, is described. The structure contributes seven transmission zeros to the stopband and the performance compares to that of a Cauer filter. The structure has the advantage of having impedance levels that are readily realizable.en© The Institution of Engineering and Technology 2010. This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering. This paper is a postprint of a paper submitted to and accepted for publication in Elecronics Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.WidebandOverlay inductorImpedance levelsBroadband communication systemsHarmonics (Electric waves)Electric inductorsPostprint Article