Abstract
This paper presents a wideband vector-sum phase shifter (VSPS) that operates over the entire WR-3 band (220-320 GHz). Compared to conventional VSPSs with double Gilbert cells, the proposed phase shifter employs a single Gilbert-cell structure for vector modulation. This reduces the output current combining ratio from 8:2 to 4:2, and boosts the impedance at the combining node, thus facilitating wideband output matching at upper millimeter-wave and terahertz bands. The simplified structure leads to a reduction in dc power consumption and chip area without sacrificing the 360° phase-shifting property. Lossy matching is applied at the Gilbert-cell output to further increase bandwidth and stability at the expense of relatively high loss. The phase shifter is implemented using a 250-nm InP DHBT technology that provides fT and fmax exceeding 370 and 650 GHz, respectively. The measurements exhibit a wideband phase shift with continuous 360° coverage and average insertion loss ranging from 11.8 to 15.6 dB for the entire WR-3 band. The root mean square amplitude and phase error among different phase states are less than 1.2 dB and 10.2°, respectively. The input-referred 1-dB compression is measured at 0.7 dBm on average. The dc power consumption is 21.8-42.0 mW at different phase states.
| Original language | English |
|---|---|
| Article number | 6979282 |
| Pages (from-to) | 256-265 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 63 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
Fingerprint
Keywords
- Beam forming
- InP DHBT
- lossy matching
- single Gilbert-cell structure
- vector-sum phase shifter (VSPS)
- WR-3 band
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
- Radiation
Cite this
A 220-320-GHz vector-sum phase shifter using single Gilbert-cell structure with lossy output matching. / Kim, Younghwan; Kim, Sooyeon; Lee, Iljin; Urteaga, Miguel; Jeon, Sanggeun.
In: IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 1, 6979282, 01.01.2015, p. 256-265.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A 220-320-GHz vector-sum phase shifter using single Gilbert-cell structure with lossy output matching
AU - Kim, Younghwan
AU - Kim, Sooyeon
AU - Lee, Iljin
AU - Urteaga, Miguel
AU - Jeon, Sanggeun
PY - 2015/1/1
Y1 - 2015/1/1
N2 - This paper presents a wideband vector-sum phase shifter (VSPS) that operates over the entire WR-3 band (220-320 GHz). Compared to conventional VSPSs with double Gilbert cells, the proposed phase shifter employs a single Gilbert-cell structure for vector modulation. This reduces the output current combining ratio from 8:2 to 4:2, and boosts the impedance at the combining node, thus facilitating wideband output matching at upper millimeter-wave and terahertz bands. The simplified structure leads to a reduction in dc power consumption and chip area without sacrificing the 360° phase-shifting property. Lossy matching is applied at the Gilbert-cell output to further increase bandwidth and stability at the expense of relatively high loss. The phase shifter is implemented using a 250-nm InP DHBT technology that provides fT and fmax exceeding 370 and 650 GHz, respectively. The measurements exhibit a wideband phase shift with continuous 360° coverage and average insertion loss ranging from 11.8 to 15.6 dB for the entire WR-3 band. The root mean square amplitude and phase error among different phase states are less than 1.2 dB and 10.2°, respectively. The input-referred 1-dB compression is measured at 0.7 dBm on average. The dc power consumption is 21.8-42.0 mW at different phase states.
AB - This paper presents a wideband vector-sum phase shifter (VSPS) that operates over the entire WR-3 band (220-320 GHz). Compared to conventional VSPSs with double Gilbert cells, the proposed phase shifter employs a single Gilbert-cell structure for vector modulation. This reduces the output current combining ratio from 8:2 to 4:2, and boosts the impedance at the combining node, thus facilitating wideband output matching at upper millimeter-wave and terahertz bands. The simplified structure leads to a reduction in dc power consumption and chip area without sacrificing the 360° phase-shifting property. Lossy matching is applied at the Gilbert-cell output to further increase bandwidth and stability at the expense of relatively high loss. The phase shifter is implemented using a 250-nm InP DHBT technology that provides fT and fmax exceeding 370 and 650 GHz, respectively. The measurements exhibit a wideband phase shift with continuous 360° coverage and average insertion loss ranging from 11.8 to 15.6 dB for the entire WR-3 band. The root mean square amplitude and phase error among different phase states are less than 1.2 dB and 10.2°, respectively. The input-referred 1-dB compression is measured at 0.7 dBm on average. The dc power consumption is 21.8-42.0 mW at different phase states.
KW - Beam forming
KW - InP DHBT
KW - lossy matching
KW - single Gilbert-cell structure
KW - vector-sum phase shifter (VSPS)
KW - WR-3 band
UR - http://www.scopus.com/inward/record.url?scp=84920734670&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84920734670&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2014.2376515
DO - 10.1109/TMTT.2014.2376515
M3 - Article
AN - SCOPUS:84920734670
VL - 63
SP - 256
EP - 265
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 1
M1 - 6979282
ER -