Passive Reciprocal high-pass/low-pass 4-bit phase shifter at 2.45 GHz
Paper i proceeding, 2014

This paper presents the design, fabrication and measurement of a low cost, reciprocal 4-bit phase shifter at 2.45 GHz ISM band using COTS components. High-pass/low-pass filters in π configuration are used to implement the phase shifter bit sections. SPDT switches are realized with BAP51 dual PIN diodes, with resonant inductors in the off-state to provide high isolation. The driver circuit consisting of 74AHC240 octal buffer/inverter was implemented to switch the PIN diodes and control the phase states. A compact layout of the 4-bit phase shifter and driver circuitry was fabricated on a 4-layer FR4 substrate. The total size of the PCB board was 4.9×5.3 cm. The measurement results showed an RMS phase error better than 4.1°, insertion loss better than 8.8 dB and return loss better than 13 dB. The maximum power consumption of the 4-bit phase shifter was 80 mW.

p-i-n diodes

ISM band

phase shifter


Muhammad Tayyab Qureshi

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Vincent Desmaris

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

M Geurts

NXP Semiconductors Netherlands

J Van De Sluis

NXP Semiconductors Netherlands

44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014; Fiera di RomaRome; Italy; 6 October 2014 through 9 October 2014

1076-1078 6986625
978-287487035-4 (ISBN)


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