What was the impact of the coronavirus on the company's revenue in Q1 2019 
f increasing presence and capabilities in China, that has never changed. And other activities that one would have to move forward with 300-millimeter. I think we are making good progress across several fronts there, not to a point right now of needing to release. And -- but certainly, it remains in a strong direction of the Company, a strong direction of our Board of Directors, and with very substantial progress is being made.
Rajvindra Gill -- Needham & Company -- Analyst
And last question from me. In terms of -- and then, I know, it's hard to assess, but the growth in RF-SOI in mobile, last year was pretty strong. We obviously have 5G smartphone kind of ramp going on. Any kind of impact that you're seeing over the last few weeks from your customers related to the coronavirus? The indirect impact that you're seeing? Or just kind of what you see -- what you see might see in the next quarter or so? Maybe perhaps curtailing the 5G smartphone ramp, any thoughts there would be helpful. Thank you.
Russell Ellwanger -- Chief Executive Officer
As I stated, we stay very close with our customers. We have not yet seen any substantial reduction in forecasts or push out of orders. We did within Q1, as stated have $3 million to $5 million impact. It was coronavirus related. And that instance, it really dealt with some very specific back-end processing and packaging, that was impacted because of the reduction or not reduction due to the requirements that people would not come back to -- in certain regions -- to work and stay at home for longer than the Chinese New Year. And so that did have an impact. I don't know that that would continue. I -- it doesn't appear that it is. But that was a $3 million to $5 million impact, and it was from specific directions of people staying home to make sure that they stay safe, and that spread of the virus remains contained. That is no longer the case to my understanding for that specific area. But, no, we have really not seen it. I mean it's obvious that things can happen and things that we are not yet aware of, but we have not yet seen any reduction on and that's just the case.
Rajvindra Gill -- Needham & Company -- Analyst
Great. Thank you.
Operator
The next question is from Achal Sultania of Credit Suisse. Please go ahead.
Achal Sultania -- Credit Suisse -- Analyst
Hi, good afternoon. Just two questions. First on the RF mobile side. Obviously, my understanding is that you've got strong relationship with Skyworks and Qorvo on the RF side. Obviously, with all the US/China trade tensions, it seems like the Chinese companies are looking for alternative suppliers outside of the US in the RF space, specifically. So can you help us understand your exposure in that RF mobile space beyond some of the dominant US players. And then secondly on the silicon germanium side, can you give us some color around, my understanding is that your revenues in silicon germanium are trending around $30 million to $40 million a quarter. Is that the right number? And when you think -- when you talk about growth in 2020, is it fair to assume that first half run rate is similar to what we are seeing currently? And then we see 20% growth from that base as we go into second half of this year. Thank you.
Russell Ellwanger -- Chief Executive Officer
Okay. I'm sorry, could you tell me the number. I missed. And what was the number that you said?
Achal Sultania -- Credit Suisse -- Analyst
Around $30 million to $35 million per quarter in silicon germanium right now, in -- during 2019.
Russell Ellwanger -- Chief Executive Officer
Okay.
Achal Sultania -- Credit Suisse -- Analyst
And that going to, like, do we expect similar numbers in H1 of this year, and then we expect a 20% growth half over half as we go into H2 from that base?
Russell Ellwanger -- Chief Executive Officer
So on that, let's see. In that range, for the first half, correct. And, yeah, breaking that range in the second half, exactly correct.
Oren Shirazi -- Chief Financial Officer, Senior Vice President of Finance
Yeah. Yes. And by the way, Russell said, the $136 million
f increasing presence and capabilities in China, that has never changed. And other activities that one would have to move forward with 300-millimeter. I think we are making good progress across several fronts there, not to a point right now of needing to release. And -- but certainly, it remains in a strong direction of the Company, a strong direction of our Board of Directors, and with very substantial progress is being made.
Rajvindra Gill -- Needham & Company -- Analyst
And last question from me. In terms of -- and then, I know, it's hard to assess, but the growth in RF-SOI in mobile, last year was pretty strong. We obviously have 5G smartphone kind of ramp going on. Any kind of impact that you're seeing over the last few weeks from your customers related to the coronavirus? The indirect impact that you're seeing? Or just kind of what you see -- what you see might see in the next quarter or so? Maybe perhaps curtailing the 5G smartphone ramp, any thoughts there would be helpful. Thank you.
Russell Ellwanger -- Chief Executive Officer
As I stated, we stay very close with our customers. We have not yet seen any substantial reduction in forecasts or push out of orders. We did within Q1, as stated have $3 million to $5 million impact. It was coronavirus related. And that instance, it really dealt with some very specific back-end processing and packaging, that was impacted because of the reduction or not reduction due to the requirements that people would not come back to -- in certain regions -- to work and stay at home for longer than the Chinese New Year. And so that did have an impact. I don't know that that would continue. I -- it doesn't appear that it is. But that was a $3 million to $5 million impact, and it was from specific directions of people staying home to make sure that they stay safe, and that spread of the virus remains contained. That is no longer the case to my understanding for that specific area. But, no, we have really not seen it. I mean it's obvious that things can happen and things that we are not yet aware of, but we have not yet seen any reduction on and that's just the case.
Rajvindra Gill -- Needham & Company -- Analyst
Great. Thank you.
Operator
The next question is from Achal Sultania of Credit Suisse. Please go ahead.
 Achal Sultania -- Credit Suisse -- Analyst
Hi, good afternoon. Just two questions. First on the RF mobile side. Obviously, my understanding is that you've got strong relationship with Skyworks and Qorvo on the RF side. Obviously, with all the US/China trade tensions, it seems like the Chinese companies are looking for alternative suppliers outside of the US in the RF space, specifically. So can you help us understand your exposure in that RF mobile space beyond some of the dominant US players. And then secondly on the silicon germanium side, can you give us some color around, my understanding is that your revenues in silicon germanium are trending around $30 million to $40 million a quarter. Is that the right number? And when you think -- when you talk about growth in 2020, is it fair to assume that first half run rate is similar to what we are seeing currently? And then we see 20% growth from that base as we go into second half of this year. Thank you.
Russell Ellwanger -- Chief Executive Officer
Okay. I'm sorry, could you tell me the number. I missed. And what was the number that you said?
Achal Sultania -- Credit Suisse -- Analyst
Around $30 million to $35 million per quarter in silicon germanium right now, in -- during 2019.
Russell Ellwanger -- Chief Executive Officer
Okay.
Achal Sultania -- Credit Suisse -- Analyst
And that going to, like, do we expect similar numbers in H1 of this year, and then we expect a 20% growth half over half as we go into H2 from that base?
Russell Ellwanger -- Chief Executive Officer
So on that, let's see. In that range, for the first half, correct. And, yeah, breaking that range in the second half, exactly correct.
Oren Shirazi -- Chief Financial Officer, Senior Vice President of Finance
Yeah. Yes. And by the way, Russell said, the $136 million