A Compact 5.6GHz BAW Filter Design Using Meandered Path

In this study, we investigate the design of a 5.6GHz BAW filter, demonstrating how modifying the die layout can achieve a 45% reduction in size while maintaining nearly identical performance. A comparison of simulation results and measurement data reveals that the new die layout introduces only a slight increase in insertion loss (less than 0.12 dB) within the band, while exhibiting similar performance in terms of out-of-band characteristics, rejection levels, steepness, and return losses. These findings highlight the trade-off between size reduction and minimal performance loss, making the modified die layout a promising option for compact 5.6GHz filter designs.