Princess Kate is expected to undertake more royal duties than previously planned as she attends her first state visit since she announced she was diagnosed with cancer.She will join King Charles and the Prince of Wales as they host the Emir of Qatar and one of his wives on the last visit to Buckingham Palace for three years.Buckingham Palace announced that Queen Camilla will miss part of the engagement due to “lingering” side effects from a chest infection she developed on her return from a royal tour of the South Pacific in October.The Princess of Wales will take part in an official welcome by Horse Guards and a carriage procession back to Buckingham Palace.Princess Kate, 42, is expected to undertake more royal duties than previously plannedGettyThe 42-year-old, who is gradually returning to royal duties, will also join senior members of the Royal Family for a private lunch at the monarch’s official residence and stay to view a display of Qatari artefacts from the Royal Collection.However, she will miss the evening’s State Banquet.In March, Princess Kate announced her cancer diagnosis, however, in a health boost in September, the royal revealed she had finished her preventative chemotherapy treatment as she continues to recover.The Princess of Wales attended several high-profile events, such as Trooping the Colour, Remembrance Sunday, and Wimbledon, over the last 11 months since she stepped back from senior working duties to focus on her recovery.In March, Princess Kate announced her cancer diagnosis, however, in a health boost in September, the royal revealed she had finished her preventative chemotherapy treatment as she continues to recoverGettyPrincess Kate will host 1,600 people who will join the Royal Family at Westminster Abbey on December 6 for her Together at Christmas annual carol service.The state visit is considered one of the highlights of the royal calendar.Senior Qatari diplomats have told the Mail that they are “deeply honoured” the King has chosen their country as the first Middle Eastern state to be invited for a full state visit to the UK since Charles’ accession.Queen Camilla, 77, is set to miss the ceremonial welcome, the outdoor event on Horse Guards Parade, and the carriage ride back to Buckingham Palace.Princess Kate is gradually returning to royal dutiesGettyThe royal will attend lunch at the Palace on the royal party’s return and hopes to view an exhibition in the Picture Gallery.Camilla, who contracted a chest infection after her royal tour of Australia and Samoa, is said to have been left with “significantly diminished reserves of energy”.The Queen’s was forced to withdraw from the Remembrance Sunday Weekend and the Royal Variety Performance in November due to her health concerns.Royal doctors are thought to be keen to prevent any further setback from the nasty chest infection.