  This paper presents the design and implementation of a simple, single-layer,
broadband (97%, 11.3-32.3 GHz) Radar Cross Section Reduction (RCSR) Modulated
Surface (MS). It uses modulation of the edge-length of the square patch (SP)
radiators within adjacent unit cells. By using Sinusoidal Modulation (SM) of
the edge length of the unit cells, the unit cells sequences with phase
gradient, that plays an effective role in improving the RCSR, can be used for
wideband RCSR achievement. The proposed structure with the dimension of
250*250mm2 that consists of 40 * 40 unit cells with period of 6mm printed on a
RO4003 substrate of 1.6mm thickness and has been considered. Measurements on a
prototype were conducted considering both mono- and bi-static arrangements for
oblique incidences for both TM and TE polarization tests. A good agreement
between simulation and measurement results proves the validity of the design
criteria.
