The phrase "broad range of fields" is correct and usable in written English.
It generally means a variety of different areas, topics, or subjects. For example, "The university provides students the opportunity to explore a broad range of fields, from biology to psychology."
He absorbed knowledge from a broad range of fields with the efficiency of a power shovel scooping earth.
The management company would receive rights of first refusal to select Soviet basic technologies in a broad range of fields.
Expanding supplies of data and cheap processing power will drive demand for IT specialists in a broad range of fields.
Teachers College educates across a broad range of fields, from policymaking to research to health care education.
The program provides excellent preparation for subsequent graduate education and research in a broad range of fields.
Over the past decade or so researchers have been developing nanotechnology applications in a broad range of fields including engineering, electronics, biotechnology, medicine, power generation and environmental protection.
It annually awards "genius grants" to a group of 20 to 30 talented, innovative, and creative individuals from a broad range of fields.
We welcome students from a broad range of fields including life-sciences programs as well as from quantitative fields such as CS, Statistics, etc.
Nominees for the award are brought to the program's attention through a changing pool of external nominators chosen from a broad range of fields and areas of interest.
Omeljan Pritsak was a man of seemingly inexhaustible energy, broad erudition, and total dedication to scholarship in a broad range of fields.
New to the conference this year was a hall of student posters showcasing data science work in a broad range of fields, and recruitment opportunities for industry partners.
