Question about going in to RF engineering

Hi there, I am currently a second year electrical engineering student in Canada. I am thinking about get into the field of RF engineering for my next year of study. However, from i have heard online, I am having doubts about getting into this field.
Here are the doubts i have.

1: Does this field required a PHD to get a really good job in CANADA. I am planning to do Master , but not PHD.

2: What is job outlook for new graduates in RF hardware Engineering field?(compare to like digital electronic, power engineering) I will be doing a co-op this summer as a RF hardware designer. and mostly likely doing PEY next year, That would give me about 2 year experience in the field. I am having good GPA during school. How difficult for me get a job after graduation? I heard that Company is only hiring RF people with at least 8 years of experiences.

3: If i decide to go into this field, What knowledge is required to success in this field? in other word, what course should i take?

4: What kind of company is hiring for this position in CANADA.( I only know that company making phones are hiring RF engineer).

5: I am also interested in the area of power engineering, Is possible to switch from RF engineering to power engineering in the future.

Thanks ahead
Eddy