Compact Filtering Power Divider with Low Insertion Loss for GNSS Signals

This paper presents the design of a two-way filtering power divider for Global Navigation Satellite Systems (GNSS) receivers. The implemented device has a bandpass response suitable for selecting the L1 band signals of GPS and GLONASS, which are used in the majority of the commercial receivers. The proposed architecture is a modification of the microstrip Wilkinson power divider to provide filtering without significantly increasing the area required for its implementation. Therefore, it allows to replace two discrete components typically used in GNSS receivers with one integrated device, reducing the cost and the size of the circuits. Measurements carried out to the fabricated prototype show that bandpass filtering characteristics are attained with a typical insertion loss of about 3.5 dB and good impedance matching at all ports. The implemented design is compact since the effective area in terms of the guided wavelength is x