MICROSTRIP LINE FILTER

摘要

A microstrip line filter which can enhance capacitive coupling between resonators, while suppressing scaling down of the electrode. A microstrip line filter (100) comprises major surface lines (6A-6D), a ground electrode (11) and I/O electrodes (12A, 12B). The major surface lines (6A, 6B) are coupled capacitively. The major surface lines (6B, 6C) are coupled inductively. The major surface lines (6C, 6D) are coupled capacitively. The major surface lines (6A-6D) have open end side electrodes (61A-61D), short circuit side electrodes (62A-62D), and open end electrodes (63A-63D). The open end electrodes (63A, 63B) are arranged close to each other and the short circuit side electrodes (62A, 62B) are spaced apart from each other. The open end electrodes (63C, 63D) are arranged close to each other and the short circuit side electrodes (62C, 62D) are spaced apart from each other.