In this paper, two techniques are used to design a novel RFSS. The first technique is based on using a diode between the metallic parts of the FSS elements.
The paper is organized as follows: In Section 2, two designs of different RFSS structures are described.
A multi-Bernoulli RFS [Y.sub.k] is a union of a fixed number of independent Bernoulli RFSs
[Y.sup.(i).sub.k], i = 1,..., [M.sub.k], that is, [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is thus completely described by the multi-Bernoulli parameter set [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] with the mean cardinality [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] and the probability density 
accepted by RFSs. (216) The FAO agreements demonstrate general consensus
RFSs must encourage flag states to require such authorization prior to
Different methods have been used to reconfigure or tune the response of the RFSS: a) by modifying the constitutive parameters of the FSS screen or substrate [20-23], b) by changing the geometry of the periodic unit cell , and c) by introducing control devices into the periodic unit cell [25, 26].
Various FSS and RFSS based on rings have been proposed, including shorted ring slots, loaded ring slots, active rings, split rings, and trapped rings [36-39].