What was the sequential increase in the XBAW filter business in Q3 compared to Q2 
urers that work with the OEMs, and they support multiple OEM programs.
So we have good activity in North America, and also in regions of Europe that are also supported out of those Taiwan- and China-designed locations. So this pipeline will continue to increase. We talked about 12 design wins, 13 design wins, that we're at right now and I expect it to continue to increase. Yeah, we've got goals that we established of design wins per quarter, not all of those will go into production.
The main thing is just is get, obviously, your product onto every platform and work with customers. We have a lot of customer intimacy to support them through the application engineering and really get that product to its optimal performance so that they want to release that into production. So we'll continue to focus on WiFi 6e, primarily, and WiFi 6 at a smaller percentage 
Jeff Shealy -- Founder and Chief Executive Officer
And Wei, this is Jeff. Let me just add a couple of points. With the recent acquisition of RFMi. I think we've done -- the team has done a really good job of aligning the sales channels, filling in the gaps.
So we're clearing the path. Dave talked about some of the expansion that we have in Asia ongoing. So that's extremely important. And just in terms of the pipeline, just to emphasize, I know we guided sequentially 25% up.
But if you look at if you look at the -- with some of the RFMi product revenue being flat to down quarter over quarter, you're then looking at a sequential increase in the core XBAW filter business, it's going to be up well over 50%. So we think that, and we see that continuing not only for Q3, but we see we've got a pipeline of design wins that are -- really support that continued growth in the Q4. So the pipeline, I think we're getting good feedback on what we're doing in the sales channel, and that's leading to design wins, sales funnel, and with the sales channels that we have, leading to a very nice sequential growth in the in the XBAW business.
Wei Mok
Great, thanks for that. So in regards to RFMi, do you frame out how how did RFMi contribute to revenues in the December quarter? What products and markets do they come from? Thanks. 
Jeff Shealy -- Founder and Chief Executive Officer
So, yeah. So let me ouch on that. So we previously -- when we acquired the RFMi business, or the 51% majority ownership of it, we gave guidance. They came in above expectations for the December quarter.
I think what that tells us is initial signs is we made a very good acquisition here. And I think the emphasis there is new markets, as well as new sales channel, complementary sales channel, and then also more traction with our OSAT suppliers. So that's our overseas assembly and test. It was certainly one of them we've picked up additional traction in and additional priority.
We do expect them to be flat to down for the March quarter and then have some sequential growth in the fourth quarter. So that's how that plays up. In terms of some additional color in the queue, we did, if you look at note No. 7, you can get the additional analysis on RFMi.
I think there's pretty detailed analysis provided in the filing. So appreciate the question. Thank you.
Wei Mok -- Oppenheimer and Company -- Analyst
Thank you.
Operator
Thank you. Ladies and gentlemen, that concludes our question and answer session, and I'll turn the floor back to Mr. Shealy for any final comments.
Jeff Shealy -- Founder and Chief Executive Officer
Thank you, operator, and thank you, everyone, for your time today. We look forward to speaking with you during our next update call to discuss current quarter execution against the milestones we outlined today, as well as future expectations that we set. I wish everybody a happy and safe Monday, and thank you for your time and attention.
Operator
[Operator signoff]
Duration: 58 minutes
Call participants:
Tom Sepenzis -- VP Corporate Development and Investor Relations
Jeff Shealy -- Founder and Chief Executive Officer
Ken Boller -- Interim Chief Financial Officer
Anthony Stoss -- Craig-Hallum Capital Group -- Analys
urers that work with the OEMs, and they support multiple OEM programs.
So we have good activity in North America, and also in regions of Europe that are also supported out of those Taiwan- and China-designed locations. So this pipeline will continue to increase. We talked about 12 design wins, 13 design wins, that we're at right now and I expect it to continue to increase. Yeah, we've got goals that we established of design wins per quarter, not all of those will go into production.
The main thing is just is get, obviously, your product onto every platform and work with customers. We have a lot of customer intimacy to support them through the application engineering and really get that product to its optimal performance so that they want to release that into production. So we'll continue to focus on WiFi 6e, primarily, and WiFi 6 at a smaller percentage 
Jeff Shealy -- Founder and Chief Executive Officer
And Wei, this is Jeff. Let me just add a couple of points. With the recent acquisition of RFMi. I think we've done -- the team has done a really good job of aligning the sales channels, filling in the gaps.
So we're clearing the path. Dave talked about some of the expansion that we have in Asia ongoing. So that's extremely important. And just in terms of the pipeline, just to emphasize, I know we guided sequentially 25% up.
But if you look at if you look at the -- with some of the RFMi product revenue being flat to down quarter over quarter, you're then looking at a sequential increase in the core XBAW filter business, it's going to be up well over 50%. So we think that, and we see that continuing not only for Q3, but we see we've got a pipeline of design wins that are -- really support that continued growth in the Q4. So the pipeline, I think we're getting good feedback on what we're doing in the sales channel, and that's leading to design wins, sales funnel, and with the sales channels that we have, leading to a very nice sequential growth in the in the XBAW business.
Wei Mok
Great, thanks for that. So in regards to RFMi, do you frame out how how did RFMi contribute to revenues in the December quarter? What products and markets do they come from? Thanks. 
Jeff Shealy -- Founder and Chief Executive Officer
 So, yeah. So let me ouch on that. So we previously -- when we acquired the RFMi business, or the 51% majority ownership of it, we gave guidance. They came in above expectations for the December quarter.
I think what that tells us is initial signs is we made a very good acquisition here. And I think the emphasis there is new markets, as well as new sales channel, complementary sales channel, and then also more traction with our OSAT suppliers. So that's our overseas assembly and test. It was certainly one of them we've picked up additional traction in and additional priority.
We do expect them to be flat to down for the March quarter and then have some sequential growth in the fourth quarter. So that's how that plays up. In terms of some additional color in the queue, we did, if you look at note No. 7, you can get the additional analysis on RFMi.
I think there's pretty detailed analysis provided in the filing. So appreciate the question. Thank you.
Wei Mok -- Oppenheimer and Company -- Analyst
Thank you.
Operator
Thank you. Ladies and gentlemen, that concludes our question and answer session, and I'll turn the floor back to Mr. Shealy for any final comments.
Jeff Shealy -- Founder and Chief Executive Officer
Thank you, operator, and thank you, everyone, for your time today. We look forward to speaking with you during our next update call to discuss current quarter execution against the milestones we outlined today, as well as future expectations that we set. I wish everybody a happy and safe Monday, and thank you for your time and attention.
Operator
[Operator signoff]
Duration: 58 minutes
Call participants:
Tom Sepenzis -- VP Corporate Development and Investor Relations
Jeff Shealy -- Founder and Chief Executive Officer
Ken Boller -- Interim Chief Financial Officer
Anthony Stoss -- Craig-Hallum Capital Group -- Analys