The Central European country has ramped up its military spending since Russia invaded Polish ally Ukraine in 2022. Poland shares a border with both nations.

"The Polish government... will sign contracts for nearly two billion zloty" ($520 million), Defence Minister Wladyslaw Kosiniak-Kamysz told reporters.

He spoke at an international military trade fair in the southern city of Kielce, which features hundreds of exhibitors along with experts from countries including Australia, Britain and the United States.

Kosiniak-Kamysz said Poland would notably ink on Wednesday "an enormous contract for nearly 1.1 billion zloty with a Spanish group".

He said the deal would involve surveillance systems for around airports, without providing further details.

He added that Poland had inked three other contracts on Tuesday pertaining to military logistics and communications.

Poland currently spends four percent of its GDP on defence -- the highest ratio of any NATO member -- and hopes to boost the number to 4.7 percent next year.

Last month, Warsaw inked a $10 billion deal to buy 96 Apache attack helicopters from US manufacturer Boeing.

They will replace outdated Russian Mi-24 helicopters.

Just days earlier, Warsaw had announced a deal to buy hundreds of AIM-120C AMRAAM air-to-air missiles as well as a contract to build 48 launchers for US-designed Patriot air defence systems.

Poland's army numbers 200,000 soldiers, making it NATO's third largest after those of the US and Turkey and the biggest in the European Union.

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