Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume 64, Issue 12, Pages 1442-1446Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2017.2650946
Keywords
Reflection-type phase shifter; tunable phase shifter; vertically installed coupled structure; wide relative phase shift; wideband
Categories
Funding
- National Natural Science Foundation of China [61401523]
- Science and Technology Program of Guangzhou, China [201510010084]
- Fundamental Research Funds for the Central Universities [16lgzd04]
- Guangdong Natural Science Foundation [2015A030312010]
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Wide bandwidth, wide tunable phase range, and a compact circuit size are always desired for the tunable phase shifter utilized in the modern wireless communication system. However, the existing reflection-type phase shifter configurations cannot satisfy all these requirements simultaneously. To resolve these problems, the reflection load consisting of two tunable capacitors and a quarter wavelength transmission line is utilized on a vertically installed planar structure to implement a new reflection-type phase shifter. For demonstration, a reflection-type phase shifter is designed, fabricated, and measured. A wide bandwidth of 66.7% defined by 10-dB return loss had been achieved. Over the same band, a wide phase shift range up to 407 degrees can be observed. Meanwhile, the fabricated circuit occupies a compact circuit size of 0.26 lambda(g) * 0.37 lambda(g).
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