Microstrip antennas are known to have a narrow bandwidth. However, they exhibit many other advantages that make them suitable for mobile and satellite communications. While narrow in bandwidth, microstrip antennas are well-suited for dual-frequency operation. Developments in microstrip reflectarrays have further demonstrated the viability of printed-circuit technology for space communications. Combining the novel characteristics of microstrip reflectarrays with the concept of dual-frequency operation, we examine the feasibility of a stacked dual-frequency microstrip reflectarray. Our results show that accurate CAD tools are essential in the design of dual-frequency microstrip reflectarray.