Integrated waveguide power combiners with artificial dielectrics for mm-wave systems

Hu, Ziyue; Alonso‐delPino, Maria; Cavallo, Daniele; Shivamurthy, Harshitha Thippur; Spirito, M.

doi:10.1109/mwsym.2017.8058652

Cited by 1 publication

(2 citation statements)

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“…In this work, we propose to combine parallel plate waveguide (PPW) power combiner that also includes a Doherty scheme. When comparing with rectangular waveguide power combiners presented in [11, 12, 21], the PPW‐based solution given here can achieve much wider bandwidth, thanks to the non‐dispersive impedance characteristic of the PPW. Moreover, the concept is easily scalable to larger number of inputs, since the impedance of each feed is independent on the number of feeds.…”

Section: Introductionmentioning

confidence: 99%

“…More compact combiners have been proposed [6][7][8], based on parallel or series combination, but their operation is restricted by factors such as impedance variation with number of elements, narrow bandwidth and limited impedance transformation. Waveguidebased power combiners were presented in [9][10][11][12][13][14][15][16]. An important advantage of this type of structures, with respect to Wilkinson or transformer based combiners, is that the insertion losses do not increase with the number of feeds, thus resulting in efficient power combiners if a large number of PAs is needed to meet the required output power.…”

Section: Introductionmentioning

confidence: 99%

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Efficient waveguide power combiners at mm‐wave frequencies

Schelven

Spirito

Cavallo

2023

IET Microwaves Antenna & Prop

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In this study, an efficient power combiner for mm-wave frequency transmitters is investigated. The combiner is based on a parallel plate waveguide (PPW) excited with multiple parallel feeds. The Doherty power combiner scheme is also integrated in the proposed concept, to increase the efficiency of the amplifiers when implementing amplitude modulation. The advantage of the proposed PPW combiner with respect to other concepts, for example, the ones based on substrate-integrated waveguide, is the wider bandwidth and the scalability to an arbitrary number of inputs. Measured results from a demonstrator realised in standard printed circuit board technology are presented. Two variations of the combiner are implemented, one terminated with a 50 Ω coaxial output, and another integrated with an antenna. In the latter case, the waveguide is folded so that both the power combiner and the antenna fit within a half wavelength size, and thus would be compatible with a dense antenna array implementation.

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Section: Introductionmentioning

confidence: 99%