In search of the long pitch, orthoconic antiferroelectric liquid crystalline mixture (OAFLC), the high tilted host mixture with antiferroelectric smectic phase (AFLC) was formulated. The influence of the molecular dipole moment magnitude and orientation on physical properties of the AFLC was tested by doping of the host by three different dopants. The extensive study of the host material and obtained admixtures was done. Results are discussed in the context of the influence of the molecular dipole moment orientation and magnitude of the dopant on the tilt, helical pitch and spontaneous polarization of the SmC(A)* phase of obtained mixtures.