Tandem Lange 3-dB 90° hybrid implemented on FR4 substrate

Author

Hayashi, H.

Author_Institution

Fac. of Sci. & Technol., Sophia Univ., Tokyo, Japan

fYear

2014

fDate

27-28 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

This paper presents a tandem Lange 3-dB 90° hybrid. The hybrid consists of two 8.34-dB Lange couplers connected in tandem and is implemented on a 4-layer flame resistant laminate, composed of woven fiberglass cloth with an epoxy resin binder (FR4) substrate, by using inner-layer crossovers, instead of conventional bonded crossovers. Owing to its optimized tandem structure and inner-layer crossovers, for operating characteristics within the frequency range 440-760 MHz, the hybrid exhibits a power coupling of 3.5 ± 0.6 dB and return losses greater than 23 dB. Furthermore, isolation and phase difference between the output ports is greater than 29 dB and 90° ± 1°, respectively.

Keywords

coupled circuits; passive networks; power amplifiers; resins; substrates; FR4 substrate; Lange couplers; Lange hybrid; epoxy resin binder substrate; flame resistant laminate; frequency 440 MHz to 760 MHz; inner-layer crossover; optimized tandem structure; phase difference; woven fiberglass cloth; Copper; Couplers; Couplings; Hybrid power systems; Microwave circuits; Microwave imaging; Substrates; couplers; dielectric substrates; passive circuits; power amplifiers; transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

NORCHIP, 2014

Conference_Location

Tampere

Type

conf

DOI

10.1109/NORCHIP.2014.7004734

Filename

7004734