This document describes a proposed area efficient mixed decimation Multipath Delay Feedback (MDF) architecture for radix parallel Fast Fourier Transform (FFT) computation. The proposed architecture aims to improve efficiency in utilization of arithmetic resources in MDF architectures by integrating Decimation-In-Time (DIT) operations into Decimation-In-Frequency (DIF) operated computing units. This activates idle periods of arithmetic units in MDF architectures. The proposed architecture, called a mixed decimation MDF or DF architecture, is compared theoretically and experimentally to conventional MDF architectures. Results show the proposed DF architecture achieves improved efficiency in consumption of arithmetic resources.