Planar Self-similar Antennas for Broadband Millimeter-Wave Measurements

Journal Article · Sat Mar 07 00:00:00 EST 2020 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/s10909-020-02427-0· OSTI ID:1608338

Meinke, J. ^[1]; Mauskopf, P. ^[1]; Johnson, B. R. ^[2]; Flanigan, D. ^[2]; Irwin, K. ^[3]; Li, D. ^[4]; Cho, H. -M. ^[4]; Day, P. ^[5]; McMahon, J. ^[6]; Doyle, S. ^[7]; Ade, P. A. R. ^[7]

---

1. Arizona State Univ., Tempe, AZ (United States)
2. Columbia Univ., New York, NY (United States)
3. Stanford Univ., CA (United States)
4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
5. NASA Jet Propulsion Lab. (JPL), Pasadena, CA (United States)
6. Univ. of Michigan, Ann Arbor, MI (United States)
7. Cardiff Univ. (United Kingdom)

Self-similar antennas offer extremely broadband functionality and easily scalable designs. Self-similar designs with a four-arm layout are also suited for dual polarization through excitations of opposing arms, although there has only been limited use of them for millimeter-wave detectors. These antennas have been used for measurements of the cosmic microwave background (CMB), which encompass a wide frequency range and are now actively focusing more on polarization anisotropies. Here, we analyze multiple planar self-similar antenna designs with simulations in high-frequency structure simulator and ongoing physical testing. They all exhibit broadband operation between 130 and 230 GHz and can couple to both linear polarizations through the previously mentioned four-arm symmetry. Furthermore, simulations include each antenna design coupled to an extended hemispherical, AR-coated lenslet. From these, a basic bowtie-like arm design produced minimal polarization wobble with moderate beam efficiency, while a hybrid trapezoidal design provided high beam efficiency with small polarization wobble. Current fabrication versions of each are being tested, coupled to multichroic microwave kinetic inductance detectors. These planar self-similar antennas, when implemented in CMB and other detectors, could improve observations while simultaneously simplifying fabrication and detector layout.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF)
• Grant/Contract Number: AC02-76SF00515; 1509211; 1711160; 1509078; 1711242; 1506074; 1710624
• OSTI ID: 1608338
• Journal Information: Journal of Low Temperature Physics, Vol. 199, Issue 1-2; ISSN 0022-2291
• Publisher: Springer
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Antennas
Kinetic inductance detector (KID)
CMB
Polarization