An UHF Sharp Roll-Off and Wide Rejection Band Compact Low-Pass Filter with The Highest Figure of Merit for Merchandise

This paper demonstrated a sharp roll-off rate, wide rejection band, and compact size low-pass filter for Ultra High Frequency merchandise. With the proposed multi-m shaped layout, the vertical space of printed circuit board can be used more efficiently, and size of the merchandised low-pass filter can be reduced to 66.7 % compared to the original prototype. This will decrease the cost largely of the circuit board and the integrated housing. Besides, the proposed layout also considers the compatibility between the circuit and housing. Therefore, the circuit board can be integrated into the housing smoothly. This work is the case that a design can become a true merchandise for applications.