The U.S. Justice Department is doubling down on its attempt to break up Google by asking it to give up the underlying technology powering the company’s digital ad network. The proposed remedy joins a separate federal effort to separate the Chrome browser from its dominant search engine.

The government’s latest proposal was filed late Monday in a Virginia federal court 2 1/2 weeks after a federal judge ruled that parts of its lucrative digital ad network have been improperly abusing its market power to stifle competition to the detriment of online publishers.

In a 17-page filing, Justice Department lawyers argued that U.S. District Judge Leonie Brinkema should punish Google by ordering the company to offload its AdX business and DFP ad platform, tools that bring together advertisers, who want to market their products, and publishers, who want to sell commercial space on their sites, to bring in revenue.

Not surprisingly, it’s an idea that Google plans to oppose when the penalty phase of the antitrust case — known as remedy hearings — begins in late September. Google already has vowed to appeal Brinkema’s ruling that the technology powering the ad network has been breaking the law but can’t do that until the judge rules on its punishment in a decision expected late this year or early next year.

Google said in its filing Monday that divestiture of AdX and DFP wouldn’t be technically feasible because neither piece of technology is capable of working outside of Google’s proprietary infrastructure. The company proposed its own remedies to restore competition and reiterated its intent to appeal the ruling.

“Divestiture is not as simple as selling either the AdX or DFP source code to a willing buyer,” Google wrote.

Another federal judge branded the Chrome browser operation an illegal monopoly in August. The remedy hearings in the search case are set to conclude this month, with a ruling from U.S. District Judge Amit Mehta expected by Labor Day.