This paper described the design and fabrication of broadband 4-way $90^{circ}$ power divider which has a $90^{circ}$ phase difference between output ports in 20${sim}$100 MHz VHF-band. A 4-way $90^{circ}$ power divider was designed using 4-way in-phase power divider which consisted of three 2-way in-phase power dividers and two second-order all pass filters which gives $90^{circ}$ phase difference between output ports. The measured insertion loss was less then 6.6 dB, return loss and isolation were better than 19 dB, and phase error between $90^{circ}$ phase difference outputs was less than ${pm}$1$^{circ}$.