It was really probably due to indirect trade, another recent paper (2013) confirmed that most Scandinavian bronze age swords were made with Iberian and Sardinian copper starting from 1600 bc:
http://www.sciencedirect.com/science/article/pii/S0305440313002689
There is no proof of any Mycaenean trading post in Scandinavia
Origin of the copper used for Metallic objects from bronze age Scandinavia:
Note that the presence of Iberian, Sardinian and Cypriot copper dates back to several centuries before Myceneans traded directly with either Sardinia or Iberia, and while Myceneans did trade directly with South Italy, there is only proof of direct trade between Sardinians , Cretans and Cypriots as both imported and locally made Sardinian pottery was found in Cyprus and Crete, but not with Mycenean Greeks proper, though it's probable that took place too on a smaller scale.
And while a few Mycenean potsherds and Cypriot imitations did reach Iberia around 1300-1100 bc, it was probably through middlemen (probably Sardinians) according to archaeologists like Lo Schiavo.
To clarify, Myceneans most likely established some temporary emporiums in Sicily, Apulia and Calabaria, and probably Sardinia as well, but they established them in local settlements and the quantity of Mycenean pottery in the central mediterranean is really small, suggesting that trade happened sporadically.
There is no proof of Mycenean presence anywhere west of Sardinia, or North of the Adriatic coast, the few potsherds in Iberia are not even proof of direct trade since they're a handful.
All this went down around 1400-1200 bc.
There is proof of direct trade between Myceneans and the Adriatic coast of Italy, but it's very sporadic and dates back to this same period.
And to clarify further, Phoenicians were not present in the western Mediterranean, let alone the Atlantic before 850 bc conventionally;
the myth that Gadir dates back to 1100 bc is not substantiated by archaeology, it's just a Greek myth. The earliest Phoenician colonies (Utica, Gadir, Huelva, Malaga, Sulci) all date back to the late 9th century bc. So Phoenicians have nothing to do with the period of time we're talking about.
Since we're talking about the trading of copper, I'll post some interesting maps about the find spots of Cypriot type copper ingots, also known as "oxhide" ingots because of their peculiar shape:
A recent study about the interactions between Iberia, Sardinia and Cyprus during the late bronze age:
http://www.raco.cat/index.php/CuadernosArqueologia/article/viewFile/276368/392932
To sum it up briefly, there is evidence of sailors and merchants traveling in both directions, west/east and vice versa, pointing out to an exchange of ideas and technology between the Atlantic coasts and the Eastern Med, there is direct evidence of Sardinians acting as middlemen between Cyprus and Iberia.
Cyprus wasn't necessarily Mycenean, it was its own culture, though there was certainly a sizable Mycenean Greek population during the late bronze age in the island, Cyprus was its own kingdom, known as Alashiya to the Eastern Mediterranean kingdoms such as Egypt or Hatti, and it survived well into the 11th century bc, as confirmed by the Egyptian text of the travels of Wenamun.
And in the period we're talking about, 1600 bc, Cyprus didn't even have Mycenean Greeks living there yet.
Interestingly enough objects looking a lot like the oxhide copper ingots I mentioned before, were drawn in bronze age Scandinavian rock paintings. It is possible that they were traded indirectly across the Atlantic orthe European rivers and from there they reached Scandinavia, as you can see from my maps, an oxhide ingot was found in South France, Lo Schiavo thinks it reached France through Sardinian sailors, probably from France copper ingots reached Scandinavia through "French" and Central European middlemen as they were traded across the European rivers, and we know that the Nordic bronze age culture is linked to the Urnfield one.
Here's the map of the find spots of amber beads in bronze age Sardinia: